The Rise of Ideology in the Post-New Deal Party System, 1972-1992

Scholars argue that the social structural basis of the party system in the United States developed during the New Deal era has weakened, resulting in an increasing tendency for ideology to shape partisan support. We test this proposition by examining the role of ideology in the formation of partisanship in the United States over the last two decades. We find that, over the last 20 years, ideology has played an increasing role in shaping partisanship, one that cuts across traditional New Deal social group cleavages.