During the past decade, Democrats and Republicans each have received about fifty percent of the votes and controlled about half of the government, but this has not resulted in policy deadlock. Despite highly partisan political posturing, the policy regime has been largely moderate. Incremental, yet substantial, policy innovations such as welfare reform; deficit reduction; the North American Free Trade Agreement; and the deregulation of telecommunications, banking, and agriculture have been accompanied by such continuities as Social Security and Medicare, the maintenance of earlier immigration reforms, and the persistence of many rights-based policies, including federal affirmative action. In Seeking the Center, twenty-one contributors analyze policy outcomes in light of the frequent alternation in power among evenly divided parties. They show how the triumph of policy moderation and the defeat of more ambitious efforts, such as health care reform, can be explained by mutually supporting economic, intellectual, and political forces. Demonstrating that the determinants of public policy become clear by probing specific issues, rather than in abstract theorizing, they restore the politics of policymaking to the forefront of the political science agenda.