The election of 1800 ended in a tie between Thomas Jefferson and John Adams. This was because before the 12th amendment, candidates for president and vice president were on the same ballot. This meant running mates could technically be running against each other. This was a problem because Jefferson and his running mate, Aaron Burr, each received 73 votes (John Adams received 65 and his running mate, Charles C. Pinckney, received 64). This was moved to the House and Jefferson was the winner.