I am Harry S.Truman Born May 8, 1884 – December 26, 1972 was the 33rd president of the United States, serving from 1945 to 1953. I am leader of the Democratic Party,I previously served as the 34th vice president from January to April 1945 under Franklin Roosevelt and as a United States senator from Missouri from 1935 to January 1945. Assuming the presidency after Roosevelt's death, Truman implemented the Marshall Plan to rebuild the economy of Western Europe