The Burr conspiracy of 1805-1807, was a treasonous plot alleged to have been planned by American politician and former military officer
Aaron Burr
Aaron Burr Jr. (February 6, 1756 – September 14, 1836) was an American politician, businessman, lawyer, and Founding Fathers of the United States, Founding Father who served as the third vice president of the United States from 1801 to 1805 d ...
(1756-1836), in the years during and after his single term as the third
vice president of the United States
The vice president of the United States (VPOTUS) is the second-highest ranking office in the Executive branch of the United States government, executive branch of the U.S. federal government, after the president of the United States, and ranks f ...
(1801-1805), during the
presidential administration and first term of the third
president
President most commonly refers to:
*President (corporate title)
* President (education), a leader of a college or university
*President (government title)
President may also refer to:
Arts and entertainment Film and television
*'' Præsident ...
Thomas Jefferson
Thomas Jefferson (, 1743July 4, 1826) was an American Founding Fathers of the United States, Founding Father and the third president of the United States from 1801 to 1809. He was the primary author of the United States Declaration of Indepe ...
(1743-1826, served 1801-1809).
Burr was accused of attempting to use his international connections and support from a
cabal
A cabal is a group of people who are united in some close design, usually to promote their private views or interests in an ideology, a state (polity), state, or another community, often by Wiktionary:intrigue, intrigue and usually without the kn ...
of American
planters, politicians, and
United States Army
The United States Army (USA) is the primary Land warfare, land service branch of the United States Department of Defense. It is designated as the Army of the United States in the United States Constitution.Article II, section 2, clause 1 of th ...
officers to establish an independent country in the old federal
Southwest Territory
The Territory South of the River Ohio, more commonly known as the Southwest Territory or the old Southwest Territory, was an organized incorporated territory of the United States that existed from May 26, 1790, until June 1, 1796, when it was ...
(1790-1796), south of the
Ohio River
The Ohio River () is a river in the United States. It is located at the boundary of the Midwestern and Southern United States, flowing in a southwesterly direction from Pittsburgh, Pennsylvania, to its river mouth, mouth on the Mississippi Riv ...
, (future states of
Kentucky
Kentucky (, ), officially the Commonwealth of Kentucky, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Illinois, Indiana, and Ohio to the north, West Virginia to the ...
,
Tennessee
Tennessee (, ), officially the State of Tennessee, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Kentucky to the north, Virginia to the northeast, North Carolina t ...
and the future federal
Territories
A territory is an area of land, sea, or space, belonging or connected to a particular country, person, or animal.
In international politics, a territory is usually a geographic area which has not been granted the powers of self-government, ...
of later
Mississippi Territory
The Territory of Mississippi was an organized incorporated territory of the United States that was created under an organic act passed by the United States Congress, Congress of the United States. It was approved and signed into law by Presiden ...
(1798-1817), and adjacent
Alabama Territory
The Territory of Alabama (sometimes Alabama Territory) was an organized incorporated territory of the United States. The Alabama Territory was carved from the Mississippi Territory on August 15, 1817 and lasted until December 14, 1819, when i ...
), and east of the
Mississippi River
The Mississippi River is the main stem, primary river of the largest drainage basin in the United States. It is the second-longest river in the United States, behind only the Missouri River, Missouri. From its traditional source of Lake Ita ...
and north of the southern coast along the
Gulf of Mexico
The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...
; or to invade / conquer the newly-acquired
Louisiana Purchase
The Louisiana Purchase () was the acquisition of the Louisiana (New France), territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River#Watershed, Mississipp ...
of 1803, west of the
Mississippi River
The Mississippi River is the main stem, primary river of the largest drainage basin in the United States. It is the second-longest river in the United States, behind only the Missouri River, Missouri. From its traditional source of Lake Ita ...
, later organized as the
Louisiana Territory
The Territory of Louisiana or Louisiana Territory was an organized incorporated territory of the United States that existed from July 4, 1805, until June 4, 1812, when it was renamed the Missouri Territory. The territory was formed out of t ...
(1804-1812), then divided into future 18th
state
State most commonly refers to:
* State (polity), a centralized political organization that regulates law and society within a territory
**Sovereign state, a sovereign polity in international law, commonly referred to as a country
**Nation state, a ...
of
Louisiana
Louisiana ( ; ; ) is a state in the Deep South and South Central regions of the United States. It borders Texas to the west, Arkansas to the north, and Mississippi to the east. Of the 50 U.S. states, it ranks 31st in area and 25 ...
and upper / northern portion as
Missouri Territory
The Territory of Missouri was an organized incorporated territory of the United States that existed from June 4, 1812, until August 10, 1821. In 1819, the Territory of Arkansas was created from a portion of its southern area. In 1821, a southe ...
(1812-1821); or plotting against the northern parts of the colonial
New Spain
New Spain, officially the Viceroyalty of New Spain ( ; Nahuatl: ''Yankwik Kaxtillan Birreiyotl''), originally the Kingdom of New Spain, was an integral territorial entity of the Spanish Empire, established by Habsburg Spain. It was one of several ...
(later
Mexico
Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...
), still held by Spain; or against and seizing the
Florida
Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
peninsula of the longtime
Royal Spanish colony of
Spanish Florida
Spanish Florida () was the first major European land-claim and attempted settlement-area in northern America during the European Age of Discovery. ''La Florida'' formed part of the Captaincy General of Cuba in the Viceroyalty of New Spain, and th ...
, (consisting of
West Florida
West Florida () was a region on the northern coast of the Gulf of Mexico that underwent several boundary and sovereignty changes during its history. Great Britain established West and East Florida in 1763 out of land acquired from France and S ...
and
East Florida
East Florida () was a colony of Kingdom of Great Britain, Great Britain from 1763 to 1783 and a province of the Spanish Empire from 1783 to 1821. The British gained control over Spanish Florida in 1763 as part of the Treaty of Paris (1763), Tre ...
), in the
Americas
The Americas, sometimes collectively called America, are a landmass comprising the totality of North America and South America.''Webster's New World College Dictionary'', 2010 by Wiley Publishing, Inc., Cleveland, Ohio. When viewed as a sing ...
/
Western Hemisphere
The Western Hemisphere is the half of the planet Earth that lies west of the Prime Meridian (which crosses Greenwich, London, United Kingdom) and east of the 180th meridian.- The other half is called the Eastern Hemisphere. Geopolitically, ...
, part of the world-wide
Spanish Empire
The Spanish Empire, sometimes referred to as the Hispanic Monarchy (political entity), Hispanic Monarchy or the Catholic Monarchy, was a colonial empire that existed between 1492 and 1976. In conjunction with the Portuguese Empire, it ushered ...
since the early
16th century
The 16th century began with the Julian calendar, Julian year 1501 (represented by the Roman numerals MDI) and ended with either the Julian or the Gregorian calendar, Gregorian year 1600 (MDC), depending on the reckoning used (the Gregorian calend ...
.
Burr's version was that he intended to farm 40,000 acres (160 km
2) in the
Spanish Texas colonial province of the
New Spain
New Spain, officially the Viceroyalty of New Spain ( ; Nahuatl: ''Yankwik Kaxtillan Birreiyotl''), originally the Kingdom of New Spain, was an integral territorial entity of the Spanish Empire, established by Habsburg Spain. It was one of several ...
Viceroyalty
A viceroyalty was an entity headed by a viceroy. It dates back to the Spanish colonization of the Americas in the sixteenth century.
British Empire India
* British Raj, India was governed by the Governor-General of India, Governor-General and Vi ...
which had been supposedly leased to him by the
Spanish Crown
The monarchy of Spain or Spanish monarchy () is the constitutional form of government of Spain. It consists of a Hereditary monarchy, hereditary monarch who reigns as the head of state, being the highest office of the country.
The Spanish ...
.
In February 1807, former Vice President Burr was arrested on President Jefferson's orders and charged / indicted for
treason
Treason is the crime of attacking a state (polity), state authority to which one owes allegiance. This typically includes acts such as participating in a war against one's native country, attempting to Coup d'état, overthrow its government, spy ...
, despite a lack of firm evidence. While Burr was ultimately acquitted of treason in a trial, due to the lack of detailed specificity in the 1787 text of the
United States Constitution
The Constitution of the United States is the Supremacy Clause, supreme law of the United States, United States of America. It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally includi ...
about any alleged crimes of treason, the fiasco and affair further destroyed his already faltering political career.
Effigies of his likeness were hanged and burned throughout the country and the threat of additional charges from individual states forced him into
exile
Exile or banishment is primarily penal expulsion from one's native country, and secondarily expatriation or prolonged absence from one's homeland under either the compulsion of circumstance or the rigors of some high purpose. Usually persons ...
overseas in
Europe
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...
.
Burr's true intentions remain unclear and, as a result, have led to varying theories from historians: some claim that he intended to take parts of Texas and the newly acquired
Louisiana Purchase
The Louisiana Purchase () was the acquisition of the Louisiana (New France), territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River#Watershed, Mississipp ...
of 1803 for himself, while others believe he intended to try to conquer
Mexico
Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...
to the southwest (then a Royal Spanish colonial province of the
Kingdom of Spain
Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...
in the
Viceroyalty
A viceroyalty was an entity headed by a viceroy. It dates back to the Spanish colonization of the Americas in the sixteenth century.
British Empire India
* British Raj, India was governed by the Governor-General of India, Governor-General and Vi ...
of
New Spain
New Spain, officially the Viceroyalty of New Spain ( ; Nahuatl: ''Yankwik Kaxtillan Birreiyotl''), originally the Kingdom of New Spain, was an integral territorial entity of the Spanish Empire, established by Habsburg Spain. It was one of several ...
, in the
Americas
The Americas, sometimes collectively called America, are a landmass comprising the totality of North America and South America.''Webster's New World College Dictionary'', 2010 by Wiley Publishing, Inc., Cleveland, Ohio. When viewed as a sing ...
, part of the world-wide
Spanish Empire
The Spanish Empire, sometimes referred to as the Hispanic Monarchy (political entity), Hispanic Monarchy or the Catholic Monarchy, was a colonial empire that existed between 1492 and 1976. In conjunction with the Portuguese Empire, it ushered ...
), or even as the gossip extended to wild accusations of conquering even the entirety of the continent of
North America
North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
. The number of men backing him is also unclear, with wide-ranging different inconclusive accounts ranging from fewer than 40 men to upwards of 7,000.
James Wilkinson

General
James Wilkinson
James Wilkinson (March 24, 1757 – December 28, 1825) was an American army officer and politician who was associated with multiple scandals and controversies during his life, including the Burr conspiracy.
He served in the Continental Army du ...
was one of Burr's key partners. The
Commanding General of the United States Army
Commanding General of the United States Army was the title given to the service chief and highest-ranking officer of the United States Army (and its predecessor the Continental Army), prior to the establishment of the Chief of Staff of the Unit ...
at the time, Wilkinson was known for his attempt to separate
Kentucky
Kentucky (, ), officially the Commonwealth of Kentucky, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Illinois, Indiana, and Ohio to the north, West Virginia to the ...
and
Tennessee
Tennessee (, ), officially the State of Tennessee, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Kentucky to the north, Virginia to the northeast, North Carolina t ...
from the union during the 1780s.
Burr persuaded President Thomas Jefferson to appoint Wilkinson to the position of Governor of the
Louisiana Territory
The Territory of Louisiana or Louisiana Territory was an organized incorporated territory of the United States that existed from July 4, 1805, until June 4, 1812, when it was renamed the Missouri Territory. The territory was formed out of t ...
in 1805. Wilkinson would later send a letter to Jefferson that Wilkinson claimed was evidence of Burr's treason.
Contacts with the British
While Burr was still vice president, in 1804 he met with
Anthony Merry, the
British Minister to the United States. As Burr told several of his colleagues, he suggested to Merry that the British might regain power in the Southwest if they contributed guns and money to his expedition. Burr offered to detach Louisiana from the Union in exchange for a half million dollars and a British fleet in the
Gulf of Mexico
The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...
. Merry wrote, "It is clear Mr. Burr... means to endeavour to be the instrument for effecting such a connection—he has told me that the inhabitants of Louisiana ... prefer having the protection and assistance of Great Britain."
[Melton (2002), p. 66] "Execution of their design is only delayed by the difficulty of obtaining previously an assurance of protection & assistance from some foreign power."
Thomas Jefferson was
re-elected in 1804, but Burr was not nominated by the Democratic-Republicans to be Jefferson's running mate, and his term as vice president ended in March 1805. In November of that year, Burr again met with Merry and asked for two or three
ships of the line
A ship of the line was a type of naval warship constructed during the Age of Sail from the 17th century to the mid-19th century. The ship of the line was designed for the naval tactic known as the line of battle, which involved the two column ...
and money. Merry informed Burr that London had not yet responded to Burr's plans which he had forwarded the previous year. Merry gave him fifteen hundred dollars. Those Merry worked for in London expressed no interest in furthering an
American secession. In the spring of 1806, Burr had his final meeting with Merry. In this meeting Merry informed Burr that still no response had been received from London. Burr told Merry, "with or without such support it certainly would be made very shortly." Merry was recalled to Britain on June 1, 1806.
Travels to the Ohio Valley and Louisiana Territory
In 1805, Burr wrote to the newly appointed judge to Louisiana Territory that he had amorphous plans to travel westword.

That year Burr traveled from Pittsburgh, down the
Ohio River
The Ohio River () is a river in the United States. It is located at the boundary of the Midwestern and Southern United States, flowing in a southwesterly direction from Pittsburgh, Pennsylvania, to its river mouth, mouth on the Mississippi Riv ...
, to the Louisiana Territory. He utilized the recently completed Louisville Canal, which allowed navigation past the Falls of the Ohio and facilitated travel to the western frontier. In the spring, Burr met with
Harman Blennerhassett, who proved valuable in helping Burr further his plan. He provided friendship, support, and most importantly, access to
Blennerhassett Island which he owned on the Ohio River, about 2 miles (3 km) below what is now
Parkersburg, West Virginia
Parkersburg is a city in Wood County, West Virginia, United States, and its county seat. Located at the confluence of the Ohio River, Ohio and Little Kanawha River, Little Kanawha rivers, it is the state's List of municipalities in West Virginia ...
.
On July 27, 1805, Burr stopped at a stand near the
Duck River along the
Natchez Trace
The Natchez Trace, also known as the Old Natchez Trace, is a historic forest trail within the United States which extends roughly from Nashville, Tennessee, to Natchez, Mississippi, linking the Cumberland River, Cumberland, Tennessee River, ...
to attend a party celebrating the signing of the
Treaty of the Chickasaw Nation.
In 1806, Blennerhassett offered to provide Burr with substantial financial support. Burr and his co-conspirators used this island as a storage space for men and supplies. Burr tried to recruit volunteers to enter Spanish territories. In
New Orleans
New Orleans (commonly known as NOLA or The Big Easy among other nicknames) is a Consolidated city-county, consolidated city-parish located along the Mississippi River in the U.S. state of Louisiana. With a population of 383,997 at the 2020 ...
, he met with the Mexican associates, a group of ''
criollos
In Hispanic America, criollo () is a term used originally to describe people of full Spanish descent born in the viceroyalties. In different Latin American countries, the word has come to have different meanings, mostly referring to the local ...
'' whose objective was to conquer Mexico (still part of
New Spain
New Spain, officially the Viceroyalty of New Spain ( ; Nahuatl: ''Yankwik Kaxtillan Birreiyotl''), originally the Kingdom of New Spain, was an integral territorial entity of the Spanish Empire, established by Habsburg Spain. It was one of several ...
at the time). Burr was able to gain the support of New Orleans' Catholic bishop for his expedition into Mexico. Reports of Burr's plans first appeared in newspaper reports in August 1805, which suggested that Burr intended to raise a western army and "to form a separate government."
In early 1806, Burr contacted the Spanish diplomat and future
Prime Minister
A prime minister or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. A prime minister is not the head of state, but r ...
,
Carlos Martínez de Irujo y Tacón and told him that his plan was not just western secession, but the capture of
Washington, D.C.
Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River, across from Virginia, and shares land borders with ...
Irujo wrote to his masters in Madrid about the coming "dismemberment of the colossal power which was growing at the very gates" of New Spain. Irujo allegedly gave Burr a few thousand dollars to commence his plan. The Spanish government in Madrid took no action.
Following the events in Kentucky, Burr returned to the West later in 1806 to recruit more volunteers for a military expedition down the
Mississippi River
The Mississippi River is the main stem, primary river of the largest drainage basin in the United States. It is the second-longest river in the United States, behind only the Missouri River, Missouri. From its traditional source of Lake Ita ...
. He began using Blennerhassett Island in the Ohio River to store men and supplies. The
Governor of Ohio
A governor is an administrative leader and head of a polity or political region, in some cases, such as governors-general, as the head of a state's official representative. Depending on the type of political region or polity, a ''governor'' ma ...
grew suspicious of the activity there, and ordered the state militia to raid the island and seize all supplies. Blennerhassett escaped with one boat, and he met Burr at the operation's headquarters on the
Cumberland River
The Cumberland River is a major waterway of the Southern United States. The U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed June 8, 2011 river drains almost of southern Kentucky and ...
. With a significantly smaller force, the two headed down the Ohio to the Mississippi River and New Orleans. Wilkinson had vowed to supply troops at New Orleans, but he concluded that the conspiracy was bound to fail, and rather than providing troops, Wilkinson revealed Burr's plan to President Jefferson.
Arrest
In February and March 1806, the federal attorney for Kentucky,
Joseph Hamilton Daveiss
Joseph Hamilton Daveiss (; March 1774 – November 7, 1811), a Virginia-born lawyer, received a mortal wound while commanding the Dragoons of the Kentucky Militia at the Battle of Tippecanoe. Five years earlier, Daveiss had tried to warn President ...
, wrote Jefferson several letters warning him that Burr planned to provoke a rebellion in Spanish-held parts of the West, in order to join them to areas in the Southwest and form an independent nation under his rule. Similar accusations were published against local
Democratic-Republican
The Democratic-Republican Party (also referred to by historians as the Republican Party or the Jeffersonian Republican Party), was an American political party founded by Thomas Jefferson and James Madison in the early 1790s. It championed l ...
s in the
Frankfort, Kentucky
Frankfort is the List of capitals in the United States, capital city of the U.S. state of Kentucky. It is a list of Kentucky cities, home rule-class city and the county seat, seat of Franklin County, Kentucky, Franklin County in the Upland Sou ...
, newspaper ''Western World''. Jefferson dismissed Daveiss' accusations against Burr, a Democratic-Republican, as politically motivated.
Daveiss brought charges against Burr, claiming that he intended to make war with
Mexico
Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...
. However, a grand jury declined to indict Burr, who was defended by the young attorney
Henry Clay
Henry Clay (April 12, 1777June 29, 1852) was an American lawyer and statesman who represented Kentucky in both the United States Senate, U.S. Senate and United States House of Representatives, House of Representatives. He was the seventh Spea ...
.
By mid-1806, Jefferson and his cabinet began to take more notice of reports of political instability in the West. Their suspicions were confirmed when General Wilkinson sent the president correspondence which he had received from Burr. The text of the letter that was used as the principal evidence against Burr is as follows:
In an attempt to preserve his good name, Wilkinson edited the letters. They had been sent to him in cypher, and he altered the letters to testify to his own innocence and Burr's guilt. He warned Jefferson that Burr was "meditating the overthrow of
isadministration" and "conspiring against the State." Jefferson alerted
Congress
A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...
of the plan, and ordered the arrest of anyone who conspired to attack Spanish territory. He warned authorities in the West to be aware of suspicious activities. Convinced of Burr's guilt, Jefferson ordered his arrest.

Burr continued his excursion down the Mississippi with Blennerhassett and the small army of men which they had recruited in Ohio. They intended to reach New Orleans, but in
Bayou Pierre, 30 miles north of
Natchez, they learned that a bounty was out for Burr's capture. Burr and his men surrendered at Bayou Pierre, and Burr was taken into custody. Charges were brought against him in the
Mississippi Territory
The Territory of Mississippi was an organized incorporated territory of the United States that was created under an organic act passed by the United States Congress, Congress of the United States. It was approved and signed into law by Presiden ...
, but Burr escaped into the wilderness. He was recaptured on February 19, 1807, and was taken back to Virginia to stand trial.
Trial
Burr was charged with
treason
Treason is the crime of attacking a state (polity), state authority to which one owes allegiance. This typically includes acts such as participating in a war against one's native country, attempting to Coup d'état, overthrow its government, spy ...
because of the alleged conspiracy and stood trial in
Richmond, Virginia
Richmond ( ) is the List of capitals in the United States, capital city of the Commonwealth (U.S. state), U.S. commonwealth of Virginia. Incorporated in 1742, Richmond has been an independent city (United States), independent city since 1871. ...
. A
Revolutionary War hero, U.S. Senator,
New York State Attorney General
The attorney general of New York is the chief legal officer of the U.S. state of New York and head of the Department of Law of the state government. The office has existed in various forms since 1626, originally established under the Dutch c ...
and
Assemblyman, and finally vice president under Jefferson, Burr adamantly denied and vehemently resented all charges against his honor, his character or his patriotism.
Burr was charged with treason for assembling an armed force to take New Orleans and separate the Western from the Atlantic states. He was also charged with
high misdemeanor for sending a military expedition against territories belonging to Spain.
George Hay, the prosecuting
U.S. Attorney, compiled a list of over 140 witnesses, one of whom was
Andrew Jackson
Andrew Jackson (March 15, 1767 – June 8, 1845) was the seventh president of the United States from 1829 to 1837. Before Presidency of Andrew Jackson, his presidency, he rose to fame as a general in the U.S. Army and served in both houses ...
, who previously invited Burr to stay at his house when he was on the run. To encourage witnesses to cooperate with the prosecution, Thomas Jefferson gave Hay blank pardons containing Jefferson's signature and the discretion to issue them to all but "the grossest offenders"; Jefferson later amended these instructions to include even those the prosecution believed to be most culpable, if that meant the difference in convicting Burr.
Burr's trial brought into question the ideas of
executive privilege
Executive privilege is the right of the president of the United States and other members of the executive branch to maintain confidential communications under certain circumstances within the executive branch and to resist some subpoenas and ot ...
,
state secrets privilege, and the independence of the executive. Burr's lawyers, including
John Wickham, asked Chief Justice
John Marshall
John Marshall (September 24, 1755July 6, 1835) was an American statesman, jurist, and Founding Fathers of the United States, Founding Father who served as the fourth chief justice of the United States from 1801 until his death in 1835. He remai ...
to subpoena Jefferson, claiming that they needed documents from Jefferson to present their case accurately. Jefferson proclaimed that, as president, he was "Reserving the necessary right of the President of the to decide, independently of all other authority, what papers, coming to him as President, the public interests permit to be communicated, & to whom." He insisted that all relevant papers had been made available, and that he was not subject to this writ because he held executive privilege. He also argued that he should not be subject to the commands of the
judiciary
The judiciary (also known as the judicial system, judicature, judicial branch, judiciative branch, and court or judiciary system) is the system of courts that adjudicates legal disputes/disagreements and interprets, defends, and applies the law ...
, because the Constitution guaranteed the
executive branch
The executive branch is the part of government which executes or enforces the law.
Function
The scope of executive power varies greatly depending on the political context in which it emerges, and it can change over time in a given country. In ...
's independence from the judicial branch. Marshall decided that the subpoena could be issued despite Jefferson's position of presidency. Though Marshall vowed to consider Jefferson's office and avoid "vexatious and unnecessary subpoenas", his ruling was significant because it suggested that, like all citizens, the president was subject to the law.
Chief Justice Marshall had to consider the definition of treason and whether intent was sufficient for conviction, rather than action. Marshall ruled that because Burr had not committed an act of war, he could not be found guilty (see ''
Ex parte Bollman''); the
First Amendment
First most commonly refers to:
* First, the ordinal form of the number 1
First or 1st may also refer to:
Acronyms
* Faint Images of the Radio Sky at Twenty-Centimeters, an astronomical survey carried out by the Very Large Array
* Far Infrared a ...
guaranteed Burr the right to voice opposition to the government. To merely suggest war or to engage in a conspiracy was not enough. To be convicted of treason, Marshall ruled, an
overt act of participation must be proven with evidence. Intention to divide the union was not an overt act: "There must be an actual assembling of men for the treasonable purpose, to constitute a levying of war." Marshall further supported his decision by indicating that the Constitution stated that two witnesses must see the same overt act against the country. Marshall narrowly construed the definition of treason provided in
Article III of the Constitution; he noted that the prosecution had failed to prove that Burr had committed an "overt act" as the Constitution required. As a result, the jury acquitted the defendant.
Witness testimony was inconsistent, and one of the few witnesses to testify to an "overt act of treason", Jacob Allbright, perjured himself in the process.
Allbright testified that militia General Edward Tupper raided Blennerhasset Island and attempted to arrest Harman Blennerhasset, but had been stopped by armed followers of Burr, who raised their weapons at Tupper to threaten him. In fact, Tupper had previously provided a deposition stating that when he visited the island, he had no arrest warrant, had not attempted to effect an arrest of anyone, had not been threatened, and had a pleasant visit with Blennerhasset.
The historians
Nancy Isenberg and Andrew Burstein write that Burr "was not guilty of treason, nor was he ever convicted, because there was no evidence, not one credible piece of testimony, and the star witness for the prosecution had to admit that he had doctored a letter implicating Burr." In contrast, lawyer and author
David O. Stewart concludes that Burr's intention included "acts that constituted the crime of treason, but that in the context of 1806, "the moral verdict is less clear." He points out that neither invasion of Spanish lands nor secession of American territory was considered treasonous by most Americans at the time, in view of the fluid boundaries of the American Southwest at that time, combined with the widespread expectation (shared by President Jefferson) that the United States might well divide into two nations.
Aftermath
Supreme Court Justice John Marshall's performance during the trial was closely monitored by Jefferson, who would have called for his impeachment had he been too hostile towards him or partial to Burr.
While no impeachment was made, it was enough to cause two amendments to be brought up from some members of Congress, which would have allowed federal judges to be removed without relying on the impeachment process.
Both of these amendments gained little support once proposed, so neither was approved.
Wilkinson's alteration of Burr's letter was clearly intended to minimize Wilkinson's culpability. His forgery and obviously self-serving testimony had the effect of making Burr seem to be the victim of an overzealous government. The grand jury nearly produced enough votes in favor of indicting Wilkinson for
misprision of treason. The foreman,
John Randolph said of Wilkinson that he was a "mammoth of iniquity", the "most finished scoundrel", and "the only man I ever saw who was from the bark to the very core a villain."

Blennerhassett's mansion and island had been occupied by the Virginia militia, which allegedly plundered the property.
Blennerhassett fled with his family, was arrested twice, and remained in prison until Burr's acquittal.
Afterward he moved to Mississippi to become a cotton planter.
Later in life, he and his family moved to Montreal, Canada.
Towards the end of his life, he went to Europe, where he lived until his death in
Guernsey
Guernsey ( ; Guernésiais: ''Guernési''; ) is the second-largest island in the Channel Islands, located west of the Cotentin Peninsula, Normandy. It is the largest island in the Bailiwick of Guernsey, which includes five other inhabited isl ...
on February 2, 1831.
Though victorious in court, Burr lost in the court of public opinion.
Effigies of him, the other conspirators, and Marshall were hanged all across the nation.
Burr also was found in violation of the
Neutrality Act, which in addition to the public outcry towards his acquittal, caused him to enter a self-imposed exile in Europe for protection.
While there, Burr attempted to start a revolution in Mexico with help from England, which was denied.
He went to France next, and reached out to
Napoleon
Napoleon Bonaparte (born Napoleone di Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French general and statesman who rose to prominence during the French Revolution and led Military career ...
directly, but was also denied assistance.
Defeated, Burr returned to the United States after four years overseas under the alias of M. Arnot. He resumed his law practice in New York until his death on September 14, 1836.
Legacy
Andrew Jackson's early affiliation with Burr followed him for the next 40 years. In 1842, a "Justitia" writing in the ''
New-York American'' connected the Burr conspiracy and Jackson's association with
Sam Houston
Samuel Houston (, ; March 2, 1793 – July 26, 1863) was an American general and statesman who played a prominent role in the Texas Revolution. He served as the first and third president of the Republic of Texas and was one of the first two indi ...
, writing:
Footnotes
Primary sources
*"Aaron Burr and the Definition of Treason (1783–1815)." American Eras. 8 vols. Gale Research, 1997–1998. Student Resource Center. Thomson Gale.
*"The Aaron Burr Conspiracy (1800–1860)." American Eras. 8 vols. Gale Research, 1997–1998. Student Resource Center. Thomson Gale.
*American State Papers, 9th Congress, 2nd Session
**Miscellaneous: Volume 1, 468 pp, No. 217. Burr's Conspiracy.
**Miscellaneous: Volume 1, 478 pp, No. 223. Burr's Conspiracy – his arrest.
*"Burr's Conspiracy, 1805–1807." DISCovering U.S. History. Online Edition. Gale, 2003. Student Resource Center. Thomson Gale.
*''United States v. Burr'', 25 Fed. Cas. 30 (C.C.D. Va. 1807) (Opinion of Marshall, C.J.)
Further reading
* Barker, Joanne. "The Treason Trial of Aaron Burr: America's Would-be Caesar." ''Famous American Crimes and Trials: 1607–1859'' 1 (2004): 141+.
* Fisher, Louis. "The Law: Jefferson and the Burr Conspiracy: Executive Power against the Law." ''Presidential Studies Quarterly'' 45.1 (2015): 157–174
online* Fruchtman, Jack. "Hero or Villain? The Treason Trial of Aaron Burr (1807)." in Michael T. Davis et al. eds. ''Political Trials in an Age of Revolutions'' (Palgrave Macmillan, Cham, 2019). 297–319.
* Hobson, Charles F.
The Aaron Burr Treason Trial'. (Omohundro Institute of Early American History and Culture, College of William and Mary, 2006).
* Hoffer, Peter. ''The treason trials of Aaron Burr'' (U. Press of Kansas, 2008)
* Isenberg, Nancy. ''Fallen Founder: The Life of Aaron Burr''. (Penguin, 2007).
* Lewis Jr., James E. ''The Burr Conspiracy: Uncovering the Story of an Early American Crisis'' (2017
*McCaleb, Walter Flavius. ''Aaron Burr Conspiracy: A History from Original and Hitherto Unused Sources'' (New York: Dodd, Mead, 1903)
online* Melton, Buckner, ''Aaron Burr, Conspiracy to Treason'', 2002,
* Stewart, David O. ''American Emperor: Aaron Burr's Challenge to Jefferson's America,'' New York: Simon & Schuster (2011).
* Wells, Colin. "'Aristocracy', Aaron Burr, and the Poetry of Conspiracy." ''Early American Literature'' 39.3 (2004): 553–576.
External links
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A conspiracy, also known as a plot, ploy, or scheme, is a secret plan or agreement between people (called conspirers or conspirators) for an unlawful or harmful purpose, such as murder, treason, or corruption, especially with a political motivat ...
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