This article is a list of United States presidential candidates.
If no candidate wins a majority of the electoral vote, the winner is determined through a contingent election held in the United States House of Representatives; this situation has occurred twice in U.S. history.
The procedures governing presidential elections were changed significantly with the ratification of the Twelfth Amendment in 1804.
[1] These six parties have nominated candidates in the vast majority of presidential elections, though some presidential elections have deviated from the normal pattern of two major party candidates.
[2][a] The following candidates received at least one electoral vote in elections held before the ratification of the Twelfth Amendment in 1804.