Roosevelt had become the first president to win a third term with his victory in the 1940 presidential election , and there was little doubt that he would seek a fourth term . Unlike in 1940 , Roosevelt faced little opposition within his own party , and he easily won the presidential nomination of the 1944 Democratic National Convention . However , that convention dropped Vice President Henry A. Wallace as Roosevelt 's running mate in favor of Senator Harry S. Truman of Missouri . Governor Dewey of New York emerged as the front-runner for the Republican nomination after his victory in the Wisconsin primary , and he defeated conservative Governor John W. Bricker at the 1944 Republican National Convention
1944 Republican National Convention
1944 Republican National Convention
1944 United States presidential election