Jeff Stonecash is professor and chair of the Department of Political Science at Syracuse University's Maxwell School. He is the author of Diverging Parties and Class and Party in American Politics. Mark D. Brewer is a visiting assistant professor in the Department of Government at Colby College. Mack Mariani is Director of Special Projects for the Monroe County Department of Communications and a Ph.D. candidate in Political Science at the Maxwell School of Citizenship and Public Affairs at Syracuse University. Previously, he served as an aide to U.S. Representative Bill Paxon and a staff member for the Monroe County Legislature.

• 1 The Reemergence of Party Polarization -- 2 Explaining Increasing Conflict -- 3 The Origins of Increased Party Polarization -- 4 Social Change and Political Implications -- 5 Social Change, Realignment, and Party Polarization -- 6 Constituencies and Party Conflict -- 7 Interpreting Congressional Elections: The Limits of the Candidate-Centered Framework