Answer
Sumner Welles returned to public service after the election of President Franklin D. Roosevelt in 1932. Welles had served as undersecretary of state under President Herbert Hoover, but resigned in 1933 after disagreements with Hoover's policies. Welles was appointed ambassador to Cuba by Roosevelt in 1933, and served in that position until 1937. He then served as undersecretary of state again from 1937 to 1943.