" Although the New York wing of the Democratic Party had made considerable inroads during 1920s, it was still the Republican Party that was home to progressives, Italians, Slavs, blacks, and many urban dwellers. By the end of the 1930s. however, the liberal wing of the Democratic Party had become its dominant image in the (Northern) public's mind. "

― , Partisan Hearts and Minds: Political Parties and the Social Identities of Voters