Thomas Jefferson took office in 1801 after defeating incumbent President John Adams in the 1800 presidential election. By July 1801, Jefferson had assembled his cabinet, which consisted of Secretary of State James Madison, Secretary of the Treasury Albert Gallatin, Secretary of War Henry Dearborn, Attorney General Levi Lincoln Sr., and Secretary of the Navy Robert Smith. Jefferson sought to make collective decisions with his cabinet, and each member's opinion was elicited before Jefferson made major decisions.Appleby, 2003, pp. 37–41. Gallatin and Madison were particularly influential within Jefferson's cabinet; they held the two most important cabinet positions and served as Jefferson's key lieutenants.McDonald, 1976, pp. 36–38. During Jefferson's administration, the key foreign policy concerns revolved around relationships with the major European powers, particularly the United Kingdom, France, and Spain—each of which continued to hold substantial territories in North America—and with conflicts with the Barbary pirates.

Background

George Washington took office in 1789 after winning the 1788 presidential election unanimously. Washington initially offered the position of Secretary of State to John Jay, but after Jay expressed his preference for a judicial appointment, Washington selected Jefferson as the first permanent Secretary of State., pp. 159–160 Washington considered himself to be an expert in both foreign affairs and the Department of War, and as such, according to Forrest McDonald, "he was in practice his own Foreign Secretary and War Secretary". p. 41 Jefferson left the cabinet at the end of 1793, and was replaced by Edmund Randolph., pp. 139, 164–165 Like Jefferson, Randolph tended to favor the French in foreign affairs, but he held very little influence in the cabinet., pp. 139 Knox, Hamilton, and Randolph all left the cabinet during Washington's second term; Randolph was forced to resign during the debate over the Jay Treaty. Timothy Pickering succeeded Knox as Secretary of War, while Oliver Wolcott became Secretary of the Treasury and Charles Lee took the position of Attorney General., pp. 161, 164–165 In 1795, Pickering became the Secretary of State, and James McHenry replaced Pickering as Secretary of War., pp. 406–407 John Adams took office in 1797 after winning the 1796 presidential election, and retained Washington's cabinet., 96–97 Jefferson, as the recipient of the second-largest number of electoral college votes, became Vice President to Adams.

In the 1800 United States presidential election, sometimes called the "Revolution of 1800", Jefferson, as the Democratic-Republican Party candidate, defeated Adams. The chief political issues of the campaign revolved around foreign policy matters, including the fallout from the French Revolution and the Quasi-War. The Federalists favored a strong central government and close relations with Great Britain. The Democratic-Republicans favored decentralization to the state governments, and the party attacked the taxes the Federalists imposed. The Democratic-Republicans also denounced the Alien and Sedition Acts, which the Federalists had passed to make it harder for immigrants to become citizens and to restrict statements critical of the federal government.

Foreign affairs Thomas Jefferson envisioned America as the force behind a great "Empire of Liberty",Robert W. Tucker, and David C. Hendrickson, Empire of Liberty: The Statecraft of Thomas Jefferson (1990) that would promote republicanism and counter British imperialism. The Louisiana Purchase of 1803, made by Jefferson in a $15 million deal with Napoleon Bonaparte, doubled the size of the growing nation by adding a huge swath of territory west of the Mississippi River, opening up millions of new farm sites for the yeomen farmers idealized by Jeffersonian democracy. President James Monroe rounded out the Southeast when he obtained Florida from Spain in the Adams–Onís Treaty.Harris G. Warren, "Textbook Writers and the Florida" Purchase" Myth". Florida Historical Quarterly 41.4 (1963): 325-331 online

President Jefferson planned the Embargo Act of 1807 to force Europe to comply. It forbade trade with both France and Britain, but they did not bend. Furthermore, Federalists denounced his policy as partisanship in favor of agrarian interests instead of commercial interests. It was highly unpopular in New England, which began smuggling operations, and proved ineffective in stopping harsh treatment from British warships.Louis Martin Sears, Jefferson and the Embargo (1927) reprint

First Barbary War

For decades prior to Jefferson's accession to office, the Barbary Coast pirates of North Africa had been capturing American merchant ships, pillaging valuable cargoes and enslaving crew members, demanding huge ransoms for their release.Fremont-Barnes, 2006, p. 36. Before independence, American merchant ships were protected from the Barbary pirates by the naval and diplomatic influence of Great Britain, but that protection came to end after the colonies won their independence.Fremont-Barnes, 2006, p. 32. In 1794, in reaction to the attacks, Congress had passed a law to authorize the payment of tribute to the Barbary States. At the same time, Congress passed the Naval Act of 1794, which initiated construction on six frigates that became the foundation of the United States Navy. By the end of the 1790s, the United States had concluded treaties with all of the Barbary States, but weeks before Jefferson took office Tripoli began attacking American merchant ships in an attempt to extract further tribute.Wood, 2009, pp. 634–636.

Jefferson was reluctant to become involved in any kind of international conflict, but he believed that force would best deter the Barbary States from demanding further tribute. He ordered the U.S. Navy into the Mediterranean Sea to defend against the Barbary Pirates, beginning the First Barbary War. The administration's initial efforts were largely ineffective, and in 1803 the frigate was captured by Tripoli. In February 1804, Lieutenant Stephen Decatur led a successful raid on Tripoli's harbor that burned the Philadelphia, making Decatur a national hero.Wood, 2009, pp. 636–639. Jefferson and the young American navy forced Tunis and Algiers into breaking their alliance with Tripoli which ultimately moved it out of the war. Jefferson also ordered five separate naval bombardments of Tripoli, which restored peace in the Mediterranean for a while,Bernstein. 2003, p. 146. although Jefferson continued to pay the remaining Barbary States until the end of his presidency.Fremont-Barnes, 2006, pp. 32–36.

Louisiana Purchase

The Louisiana Purchase was the acquisition of the 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's drainage basin west of the river. In return for fifteen million dollars, or approximately eighteen dollars per square mile, the United States nominally acquired a total of in Middle America. However, France only controlled a small fraction of this area, most of which was inhabited by Native Americans; effectively, for the majority of the area, the United States bought the preemptive right to obtain Indian lands by treaty or by conquest, to the exclusion of other colonial powers.

Jefferson believed that western expansion played an important role in furthering his vision of a republic of yeoman farmers. By the time Jefferson took office, Americans had settled as far west as the Mississippi River, though vast pockets of land remained vacant or inhabited only by Native Americans.Wood, 2009, pp. 357–359. Many in the United States, particularly those in the west, favored further territorial expansion, and especially hoped to annex the Spanish province of Louisiana. Given Spain's sparse presence in Louisiana, Jefferson believed that it was just a matter of time until Louisiana fell to either Britain or the United States.Wood, 2009, pp. 366–367. U.S. expansionary hopes were temporarily dashed when Napoleon convinced Spain to transfer the province to France in the 1801 Treaty of Aranjuez. Though French pressure played a role in the conclusion of the treaty, the Spanish also believed that French control of Louisiana would help protect New Spain from American expansion.

Napoleon's dreams of a re-established French colonial empire in North America threatened to reignite the tensions of the recently concluded Quasi-War.Appleby, 2003, pp. 63–64 He initially planned to re-establish a French empire in the Americas centered around New Orleans and Saint-Domingue, a sugar-producing Caribbean island in the midst of a slave revolution. One army was sent to Saint-Domingue, and a second army began preparing to travel to New Orleans. After French forces in Saint-Domingue were defeated by the rebels, Napoleon gave up on his plans for an empire in the Western Hemisphere.Nugent, 2008, pp. 57–59, 61 In early 1803, Jefferson dispatched James Monroe to France to join ambassador Robert Livingston in purchasing New Orleans, East Florida, and West Florida from France.Nugent, 2008, pp. 61–62 To the surprise of the American delegation, Napoleon offered to sell the entire territory of Louisiana for $15 million.Wilentz, 2005, p. 108. The Americans also pressed for the acquisition of the Floridas, but under the terms of the Treaty of Aranjuez, Spain retained control of both of those territories. On April 30, the two delegations agreed to the terms of the Louisiana Purchase, and Napoleon gave his approval the following day.Nugent, 2008, pp. 65–66

After Secretary of State James Madison gave his assurances that the purchase was well within even the strictest interpretation of the Constitution, the Senate quickly ratified the treaty, and the House immediately authorized funding.Rodriguez, 2002, p. 97. The purchase, concluded in December 1803, marked the end of French ambitions in North America and ensured American control of the Mississippi River.Ellis, 2008, p. 208. The Louisiana Purchase nearly doubled the size of the United States, and Treasury Secretary Gallatin was forced to borrow from foreign banks to finance the payment to France.Appleby, 2003, pp. 64–65 Though the Louisiana Purchase was widely popular, some Federalists criticized it; Congressman Fisher Ames wrote, "We are to give money of which we have too little for land of which we already have too much".Wood, 2009, pp. 369–370.

Burr conspiracy

Aaron Burr served as the third vice president of the United States from 1801 to 1805, during Jefferson's first term. Having been dropped from the 1804 Democratic-Republican ticket, Burr ran for the position of Governor of New York in an April 1804 election, and was defeated. Federalist Party leader Alexander Hamilton was a key factor in Burr's defeat, having made callous remarks regarding Burr. Believing that his honor was offended, Burr challenged Hamilton to a duel.Wood, 2009, pp. 383–384. On July 11, 1804, Burr mortally wounded Hamilton in a duel at Weehawken, New Jersey.Banner (1972), p. 34. Burr was indicted for Hamilton's murder in New York and New Jersey causing him to flee to Georgia, although he remained President of the Senate during Supreme Court Justice Samuel Chase's impeachment trial. The two Burr indictments were "quietly allowed to die".