The eighteenth edition of Party Politics in America continues the comprehensive and authoritative coverage of political parties for which it is known while expanding and updating the treatment of key related topics including interest groups and elections. Marjorie Hershey builds on the book’s three-pronged coverage of party organization, party in the electorate, and party in government and integrates contemporary examples—such as voter suppression, negative partisanship, campaign finance reform, party polarization, and social media—to bring to life the fascinating story of how parties shape our political system. New to the 18th Edition Fully updated through the 2020 election, including changes in virtually all of the boxed materials, the chapter openings, and the data presented. Full color presentation in all tables, figures, and boxes. Examines the impact of the Trump presidency on the Republican Party’s supporting coalition and issue positions, changes in party and ideological polarization, and the return to the world of campaign finance of "interested money" from big (and often anonymous) donors. Explores political attitudes and voter turnout among college-age and other young voters in light of dramatic changes in American politics and the economy. Expanded online Instructor’s Resources, including author-written test banks, essay questions, relevant websites with correlated sample assignments, the book’s appendix, and links to a collection of course syllabi.