Henry Wallace , Roosevelt 's vice president during his third term ( 1941 – 1945 ) , was given major responsibilities during World War II . However , after numerous policy disputes between Wallace and other Roosevelt Administration and Democratic Party officials , he was denied renomination to office at the 1944 Democratic National Convention . Harry Truman was selected instead . During his day vice presidency , Truman was not informed about any war or post-war plans , including the Manhattan Project , leading Truman to remark , wryly , that the job of the vice president was to " go to weddings and funerals . " As a result of this experience , Truman , after succeeding to the presidency upon Roosevelt 's death , recognized the need to keep the vice president informed on national security issues . Congress made the vice president one of four statutory members of the National Security Council in 1949
1944 Democratic National Convention
1944 Democratic National Convention
Vice President of the United States