<P> At the end of a long and bitter campaign , Jefferson and Burr each won 73 electoral votes , Adams won 65 electoral votes , and Pinckney won 64 electoral votes . The Federalists swept New England , the Democratic - Republicans dominated the South , and the parties split the Mid-Atlantic states of New York , New Jersey , and Pennsylvania . The Democratic - Republicans ' failure to execute their plan to award Jefferson one more vote than Burr resulted in a tie , which necessitated a contingent election in the House of Representatives . Under the terms laid out in the Constitution , the outgoing House of Representatives chose between Jefferson and Burr . Each state delegation cast one vote , and a victory in the contingent election required one candidate to win a majority of the state delegations . Neither Burr nor Jefferson were able to win on the first 35 ballots of the contingent election , as most Federalist Congressmen backed Burr and all Democratic - Republican Congressmen backed Jefferson . Hamilton personally favored Jefferson over Burr , and he convinced several Federalists to switch their support to Jefferson , giving Jefferson a victory on the 36th ballot of the contingent election . The result of this election was affected by the three - fifths clause of the United States Constitution ; historians such as Garry Wills have noted that had slaves not been counted for the purposes of congressional apportionment , Adams would have won the electoral vote . </P>
<P> At the end of a long and bitter campaign , Jefferson and Burr each won 73 electoral votes , Adams won 65 electoral votes , and Pinckney won 64 electoral votes . The Federalists swept New England , the Democratic - Republicans dominated the South , and the parties split the Mid-Atlantic states of New York , New Jersey , and Pennsylvania . The Democratic - Republicans ' failure to execute their plan to award Jefferson one more vote than Burr resulted in a tie , which necessitated a contingent election in the House of Representatives . Under the terms laid out in the Constitution , the outgoing House of Representatives chose between Jefferson and Burr . Each state delegation cast one vote , and a victory in the contingent election required one candidate to win a majority of the state delegations . Neither Burr nor Jefferson were able to win on the first 35 ballots of the contingent election , as most Federalist Congressmen backed Burr and all Democratic - Republican Congressmen backed Jefferson . Hamilton personally favored Jefferson over Burr , and he convinced several Federalists to switch their support to Jefferson , giving Jefferson a victory on the 36th ballot of the contingent election . The result of this election was affected by the three - fifths clause of the United States Constitution ; historians such as Garry Wills have noted that had slaves not been counted for the purposes of congressional apportionment , Adams would have won the electoral vote . </P>
who decided the election of 1800 since it ended up in a deadlock
who decided the election of 1800 since it ended up in a deadlock
the outgoing House of Representatives
the outgoing House of Representatives