Democratic candidates : On July 12 , the Democratic National Convention convened in Philadelphia in the same arena where the Republicans had met a few weeks earlier . Spirits were low ; the Republicans had taken control of both houses of the United States Congress and a majority of state governorships during the 1946 mid-term elections , and the public opinion polls showed Truman trailing Republican nominee Dewey , sometimes by double digits . Furthermore , some liberal Democrats had joined Henry A. Wallace 's new Progressive Party , and party leaders feared that Wallace would take enough votes from Truman to give the large Northern and Midwestern states to the Republicans
Democratic National Convention
1948 Democratic National Convention
1948 United States presidential election