Franklin D. Roosevelt

Franklin Delano Roosevelt was the 32nd President of the United States and a central figure in world events during the mid-20th century, leading the United States during a time of worldwide economic crisis and world war. The only American president elected to more than two terms (he was elected to four but only served three full terms, dying in his fourth term), he was often referred to by his initials, FDR. Roosevelt won his first of four presidential elections in 1932, while the United States was in the depths of the Great Depression. FDR's combination of optimism and economic activism is often credited with keeping the country's economic crisis from developing into a political crisis. He led the United States through most of World War II, and died in office of a cerebral hemorrhage shortly before the war ended. (Source)