In today's era of greatly divisive partisanship in Washington, interest groups have become increasingly powerful forces in U.S. politics. In races for the presidency, Congress, and state legislatures, these groups often help to elect--or reelect--candidates who support their causes and views. Now in its third edition, Interest Groups in American Campaigns: The New Face of Electioneering focuses on the key role that interest groups play in U.S. elections...