No Vice President in 1946Franklin D. Roosevelt the 32nd US President of the United States died on April 12, 1945 of a cerebral hemorrhage. Harry S. Truman the Vice President in 1945 succeeded Roosevelt to the Presidancy. Harry S. Truman was the 33rd President and was in office from April 12, 1945 to January 20, 1953. Truman did not have a Vice President for the remainder of Roosevelt's term from 1945 to 1949. His Vice President from 1949 to 1953 was Alben Barkley.