Activists and Partisan Realignment in the United States

In this paper, we contend that party realignments occur due to the interaction of candidates and activists. We examine independent party candidates who are motivated primarily to win elections but who use activist contributions to increase vote shares. In a two-dimensional policy space, such candidates will on occasion engage in “flanking” moves so as to enlist coalitions of disaffected voters, at the risk of alienating some of their traditional activist supporters. We argue that a result of such “flanking” moves, in the early part of the century, has been a shift in emphasis from an underlying social dimension to the economic dimension. In recent decades, electoral salience has shifted back to the social dimension. The net result is that the party cleavage line is much as it was a century ago—but the parties have switched sides.