Which President was in office during World War II?

The President who was in office during World War II was Franklin D. Roosevelt. He served as the 32nd President of the United States from 1933 until his death in 1945, encompassing the entirety of the conflict, which lasted from 1939 to 1945. Roosevelt played a crucial role in leading the nation through the Great Depression and into World War II, during which he implemented significant policies and strategies to mobilize the country’s economic and military resources. His leadership was instrumental in forming alliances with other nations, such as the United Kingdom and the Soviet Union, and he was a key figure in planning military operations and post-war recovery efforts. His commitment to international cooperation was evident in his involvement with the establishment of the United Nations after the war, aiming to prevent future global conflicts.