JFK and many others.
Jimmy Carter, the 39th President of the USA, served on a nuclear submarine in the U.S. Navy.
Benjamin Stoddert served under President John Adams as the second Secretary of the Navy.
Roosevelt never served in the military, but he was the Assistant Secretary of the Navy under President Wilson.
Actually many future Presidents were commanded by Presidents. Example: JF Kennedy served in the Navy under Roosevelt and Trueman (Who served in the Army under Wilson). LB Johnson served in the Navy under FDR, George HW Bush served in the Navy under FDR & Trueman. Many of the Presidents served in the military and took orders from the Presidents in office.
Gerald Ford served in the U.S. Navy during WWII.
Kennedy served in the US Navy during World War II.
No. John F. Kennedy served as the 35th President from 1961 to 1963. During the second world war, Kennedy served in the United States Navy. He rose to the rank of Lieutenant and was discharged in 1945.
Eisenhower and Truman were on active duty in WW I. FDR served as assistant secretary of the navy, but was not in the military. Theodore offered to raise and lead a company of volunteers, but his offer was declined by President Wilson .
President Jimmy Carter.
Roosevelt served as the Assistant Secretary of the Navy from 1913 to 1920. In this role, he was responsible for managing the Navy's affairs and modernizing its fleet leading up to and during World War I.
JFK quit the navy in March 1945. He was forced into early retirement due to illness that caused physical disability. JFK served as the 35th president of the United States.
Theodore Roosevelt Franklin Roosevelt for A+