The 1900 United States presidential election was the 29th quadrennial presidential election, held on Tuesday, November 6, 1900. In a re-match of the 1896 race, incumbent Republican President William McKinley defeated his Democratic challenger, William Jennings Bryan. McKinley's victory made him the first president to win a consecutive re-election since Ulysses S. Grant accomplished the same feat in 1872. Until 1956, this would be the last time in which an incumbent Republican president would win re-election after serving a full term in office. This election saw the fifth rematch in presidential history, something that would also not occur again until 1956. This was also the first rematch to produce the same winner both times.

The 1896 United States presidential election was the 28th quadrennial presidential election, held on Tuesday, November 3, 1896. Former Governor William McKinley, the Republican nominee, defeated former Representative William Jennings Bryan, the Democratic nominee. The 1896 campaign, which took place during an economic depression known as the Panic of 1893, was a political realignment that ended the old Third Party System and began the Fourth Party System.