Drawing on the wealth of material from the Nelson A. Rockefeller papers held at the Rockefeller Archive Center (RAC), my dissertation project examines the rise and fall of the "liberal" wing of the mid-twentieth century Republican Party. Big city Republicans from industrial states faced social movements that made mass democracy a vibrant force. Liberal Republicans emerged among the typically wellto-do men and women of older and established neighborhoods in New York, San Francisco, and Minneapolis. While no less an elite class than other Republican partisans, urban Republicans witnessed the upheavals and political transformation of the city firsthand. Unlike the rural and suburban right, big city Republicans simply could not imagine mounting a frontal assault against the vaunted New Deal coalition. In this setting, the reactionary bent of the party's base actually looked more like an electoral liability. Liberal Republicans insisted that winning statewide (or national) office required votes from major cities home to a diverse and organized working class that otherwise voted for Democrats. But securing any significant segment of that vote required a series of accommodations that most Republicans simply could not tolerate.