Who was the President during the Great Depression and World War II?

Franklin D. Roosevelt was the President of the United States during both the Great Depression and World War II. He took office in 1933, amidst the economic crisis of the Great Depression, and he implemented a series of programs and reforms known as the New Deal aimed at economic recovery. His leadership during this challenging time was pivotal in guiding the nation through the economic turmoil.

Furthermore, Roosevelt served as president during most of World War II, which began in 1939 and concluded in 1945. He played a significant role in shaping American foreign policy during the war and was instrumental in the establishment of international alliances to combat the Axis powers. His ability to navigate these crucial periods in U.S. history solidified his legacy as one of the most influential presidents in American history.

The other individuals mentioned in the choices did not serve as president during both of these significant events. Theodore Roosevelt served before the Great Depression, Harry S. Truman assumed the presidency after Roosevelt's death during World War II, and John F. Kennedy was president in the 1960s, long after these events. Thus, Franklin D. Roosevelt is correctly recognized for his vital role during these two critical periods in American history.