Franklin D. Roosevelt

Thirty-second President who won four consecutive terms (1932, 1936, 1940, 1944), breaking George Washington's two-term precedent and directly triggering the Twenty-Second Amendment. He died in office on April 12, 1945, 82 days into his fourth term. His New Deal programs dramatically expanded the federal government's role under the Commerce Clause, and his 1937 court-packing threat permanently altered the relationship between the executive and the judiciary.