The 1804 United States presidential election was the fifth quadrennial presidential election, held from Friday, November 2, to Wednesday, December 5, 1804. Incumbent Democratic-Republican president Thomas Jefferson defeated Federalist Charles Cotesworth Pinckney of South Carolina. It was the first presidential election conducted following the ratification of the Twelfth Amendment to the United States Constitution, which reformed procedures for electing presidents and vice presidents. Jefferson was re-nominated by his party's congressional nominating caucus without opposition, and the party nominated Governor George Clinton of New York to replace Aaron Burr as Jefferson's running mate. With former president John Adams in retirement, the Federalists turned to Pinckney, a former ambassador and Revolutionary War hero who had been Adams's running mate in the 1800 election. Though Jefferson had only narrowly defeated Adams in 1800, he was widely popular due to the Louisiana Purchase and a strong economy. He carried almost every state, including most states in the Federalist stronghold of New England. Background Although the 1800 presidential election was a close one, Jefferson steadily gained popularity during his term. American trade boomed due to the temporary suspension of hostilities during the French Revolutionary Wars in Europe, and the Louisiana Purchase was heralded as a great achievement. Nominations Democratic-Republican Party nomination The congressional nominating caucus of the Democratic-Republican Party was held in February 1804, with 108 members of the United States Congress in attendance and Senator Stephen R. Bradley as its chair. Jefferson was renominated by acclamation while Vice President Aaron Burr was not considered for renomination. The caucus selected to give the vice-presidential nomination to Governor George Clinton whose main opponent was Senator John Breckinridge. A thirteen member committee was selected to manage Jefferson's presidential campaign. Vice-presidential candidates John Breckinridge (Kentucky), U.S. Senator George Clinton (New York), Governor Gideon Granger (Connecticut), Postmaster General John Langdon (New Hampshire), former U.S. Senator Levi Lincoln (Massachusetts), U.S. Attorney General William Maclay (Pennsylvania), former U.S. Senator Balloting Federalist Party nomination The Federalists did not hold a nominating caucus, but Federalist Congressional leaders informally agreed to nominate a ticket consisting of Charles Cotesworth Pinckney of South Carolina and former Senator Rufus King of New York. Pinckney's public service during and after the American Revolutionary War had won him national stature, and Federalists hoped that Pinckney would win some Southern votes away from Jefferson, who had dominated the Southern vote in the previous election. General election Federalist leader Alexander Hamilton's