A member of the Democratic Party, he won a record four presidential elections
and became a central figure in world events during the first half of the 20th Century. Roosevelt directed the federal government during most of the Great Depression
, implementing his New Deal
domestic agenda in response to the worst economic crisis in U.S. history.
As a dominant leader of his party, he built the New Deal Coalition , which defined modern liberalism in the United States
throughout the middle third of the 20th century. His third and fourth terms were dominated by World War II
, which ended shortly after he died in office.