 La Guardia made corruption his main issue.The campaign saw mud slung three ways, with La Guardia denounced as a far-left "Red", O'Brien as a pawn of the bosses, and McKee as an anti-Semite.La Guardia's win was based on a complex coalition of regular Republicans (mostly middle class German Americans in the boroughs outside Manhattan), a minority of reform-minded Democrats, Socialists, a large proportion of middle-class Jews, and the great majority of Italians.