Realignment of the American party system is a major focus for students of voting behavior, congressional policy making, and political history (Key, 1955; Burnham, 1970; Clubb, Flannigan, and Zingale, 1980; Kleppner, 1979; Sundquist, 1973; Campbell, 1977; Trilling and Campbell, 1980; Ladd and Hadley, 1978; Brady and Stewart, 1982; Brady, 1985; Sinclair, 1982). The transformation of the party system encompasses significant shifts in electoral support for the major political parties, changes in congressional policy making, and a redirection of national policy making. The rise of new party eras is intriguing because the constitutional structure seeks to minimize such major institutional and policy change. The separation of powers, federalism, and different recruitment patterns for political leaders are structural factors inhibiting major policy change (Brady, 1985). Realignment overcomes these barriers as highly volatile and cross-cutting issues arise. These issues produce linkages between electoral choice, congressional voting, and the broad shape of national policy making.