A political scientist at the University of California, Irvine. He is an expert on American elections and party politics and is co-author of a popular undergraduate college text on American government, Government in America: People, Policy, and Politics, published by Pearson Longman. He is also the author of Where Have All the Voters Gone: The Decline of American Political Parties, Is Voting For Young People? and The Rise of Candidate-Centered Politics.