Franklin D. Roosevelt
He started a series of popular programs known as the New Deal to fight against the Great Depression.  The New Deal gave people jobs building roads, bridges, dams, parks, schools, and other public services. Also, it created Social Security, made banks insure their customers, gave direct aid to the needy, and made many regulations to the economy.  Because of this, he was re-elected in a large victory in 1936 and continued the New Deal.  The United States did not fully recover from the Great Depression until it entered World War II.