1948 - Truman runs against Thomas E. Dewey, the Republican nominee in the 1948 presidential election. The scientific pollsters, including George Gallup, all predicted that Dewey would beat Truman.

3, 1948 (UPI) --Governor Thomas E. Dewey conceded today that President Truman had been elected in the closest presidential race ... Dewey had conceded the election. ALEXANDRIA, Va., ...