Delano Roosevelt)美国31位、第32任总统，美国历史上唯一蝉联四届的总统。，在大萧条时期推出新政以挽救经济，二战爆发后推出租借法案援助盟国，，二战后期，，。，并根据他的新政联盟重组了民主党。被学者评为是美国最伟大的三位总统之一，同华盛顿和林肯齐名。
(Franklin Roosevelt)1882年01月30日出生于美国纽约。1900年至1904年就读于哈佛大学，1905年转入哥伦比亚大学法学院，参加了纽约律师考试合格后即辍学。 1910年任纽约市参议员，1912年连任。1913年任海军副部长。1921年8月休假期间患脊髓灰质炎症，仍为民主党积极分子，由其妻代为参加会议。
1939年9月，第二次世界大战爆发，，修改中立法，允许交战国在“现购自运”的条例下从美国购买武器。1940年法国战败，，决定用参战以外的一切方式援助英国。为英国提供50艘超龄驱逐舰以换取西半球八个基地。
1940年竞选总统时，。，。他提出的租借法案在国会通过。这一法案使美国可在财政上对英国及其盟国给予援助。1941年08月，他和英首相丘吉尔会于军舰上，并发表联合新闻公报，，包括民族自决、扩大经济机会、消除恐惧与匮乏、海上自由、裁军等内容。
，他在美国历史上既最受人尊敬，也最被人憎恨。他的政敌认为他浅薄、无能、狡猾、;而其拥护者则称他是美国经济的救星，。一般人都承认：，他获得广大人民的支持，在他的政府中容纳了各种观点的领袖人物。许多专家认为：尽管偶尔有混乱现象，总的说来，。
Franklin Delano Roosevelt was also known by his initials, FDR, was the 32nd President of the United States (1933–1945) and a central figure in world events during the mid-20th century, leading the United States during a time of worldwide economic depression and total war. A dominant leader of the Democratic Party and the only American president elected to more than two terms, he built a New Deal Coalition that realigned American politics after 1932, as his domestic policies defined American liberalism for the middle third of the 20th century.
With the bouncy popular song "Happy Days Are Here Again" as his campaign theme, FDR defeated incumbent Republican Herbert Hoover in November 1932, at the depth of the Great Depression. Energized by his personal victory over polio, FDR's unfailing optimism and activism contributed to a renewal of the national spirit.[1] He worked closely with Winston Churchill and Joseph Stalin in leading the Allies against Germany and Japan in World War II, and restoring prosperity to the nation's economy.
Roosevelt dominated the American political scene not only during the twelve years of his presidency, but also for decades afterward. He orchestrated the realignment of voters that created the Fifth Party System. FDR's New Deal Coalition united labor unions, big city machines, white ethnics, African Americans and rural white Southerners. He also influenced the later creation of the United Nations and Bretton Woods. Roosevelt is consistently rated by scholars as one of the top three U.S. Presidents, along with Abraham Lincoln and George Washington.