The election of 1948 is one of the greatest political comeback victories in U.S. political history.
Truman and running mate Alben Barkley won 49.6 percent of the popular vote to Dewey's 45.1 percent, which produced a lopsided electoral vote of 303 to 189, and 39 for Thurmond's Dixiecrats.
Truman's victory came about because he won the support of most of Roosevelt 's "New Deal" coalition: labor, Blacks, Jews, farmers from the mid-west, and a number of southern states.
Truman's victory, however, was far from overwhelming. He barely won California , Illinois , and Ohio , and lost the Democratic strongholds Pennsylvania , New York , Michigan , and New Jersey . In fact, more Americans voted for other candidates than voted for him.