Roosevelt re-entered national politics when he announced his bid for the presidency in the 1932 election. After securing the Democratic nomination, he unseated incumbent President Herbert Hoover, becoming the first Democrat to win an outright majority of the popular vote since Samuel J. Tilden in 1876 and effectively jumpstarting the Fifth Party System. His re-election in 1936 was the greatest electoral landslide since the largely uncontested 1820 election, receiving the highest percentage of the electoral vote won by any candidate since then. He became the first and only president to win an unprecedented third and fourth terms in 1940 and 1944, in which he continued to enjoy relatively comfortable margins of victory due to his favorable handling of World War II and the persisting popularity of the New Deal. Roosevelt would die in office less than three months into his fourth term, being succeeded by Vice President Harry S. Truman.
Source: Dave Leip's Atlas of U.S. Presidential Elections
Notes
^Chosen by acclamation.
References
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