Who was the leader of the united starts during most of world war 2?

During most of World War II, the leader of the United States was President Franklin D. Roosevelt. He served as President from 1933 until his death in April 1945, guiding the nation through the Great Depression and the majority of the war. Roosevelt played a crucial role in shaping U.S. military strategy and international relations during the conflict. After his death, Harry S. Truman became President and oversaw the final stages of the war.