Thomas Jefferson (1743–1826) was the third President of the United States, serving from March 4, 1801 to March 4, 1809 as a leader of the Democratic-Republican Party. Author of the Declaration of Independence, he promoted limited federal government, westward expansion, and support for education and science.
Jefferson's presidency is defined by the Louisiana Purchase of 1803, which doubled U.S. territory, and by sponsoring the Lewis and Clark expedition to map the West. He pursued fiscal retrenchment—reducing federal debt and limiting standing armies—and championed an agrarian vision of republican government.
His record is mixed: the Embargo Act of 1807 damaged American commerce and his clashes with the Federalist judiciary raised enduring constitutional questions; his ownership of enslaved people contrasts sharply with his rhetoric on liberty. Nonetheless, Jefferson's emphasis on expansion, education, and local government left a lasting imprint on the nation's development.
Louisiana Purchase (1803), doubling U.S. territory; Commissioned Lewis and Clark expedition (1804–06) to explore the West; Reduced federal debt and cut military spending; Enacted the Embargo Act (1807) to pressure Britain and France; Sent naval forces in the Barbary War (1801–05) against North African piracy; Presidency coincided with Marbury v. Madison, which established judicial review
Key highlights and dated events associated with this presidency.
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On December 7, 1808, the state electors met to cast their Electoral College votes, producing a victory for James Madison over Federalist candidate Charles C. Pinckney.
State-by-state balloting for the 1808 presidential election began on November 4, initiating the multi-week vote that would choose James Madison as Thomas Jefferson’s successor.
The Democratic-Republican congressional nominating caucus met and selected James Madison for president and George Clinton for vice president as the party's official ticket for the 1808 election.
On 1808-02-04 the Democratic-Republican congressional nominating caucus selected Secretary of State James Madison as the party's candidate for president in the upcoming 1808 election.
On January 30, 1808, the Democratic-Republican members of Congress held a nominating caucus and selected James Madison as their candidate for the presidency.
The federal law banning the international importation of enslaved people, passed by Congress in 1807, went into effect on January 1, 1808.
President Thomas Jefferson signed the Embargo Act, imposing a nationwide ban on American exports and forbidding U.S. vessels from engaging in foreign trade.
A federal court in Richmond, presided over by Chief Justice John Marshall, acquitted former Vice President Aaron Burr of treason charges.
The federal treason trial of Aaron Burr began in Richmond, Virginia, where he was accused of plotting to establish an independent nation in the western territories.
The British warship HMS Leopard attacked and boarded the American frigate USS Chesapeake off Norfolk, Virginia, killing and wounding crew and seizing alleged Royal Navy deserters.
On March 25, 1807, the Parliament of Great Britain passed the Slave Trade Act 1807, and it received Royal Assent, outlawing the British Atlantic slave trade.
The Tenth United States Congress began its term, assembling Senators and Representatives to legislate during a period of rising tensions over neutral trade and maritime rights.