Interest Group Politics is the only comprehensive collection of articles on interest groups and lobbying written for undergraduates. The tenth edition offers 15 new contributions on a variety of topics, including classic analyses of how groups organize and seek to affect public policy, emerging trends such as the growth of transgender groups, and fresh studies that examine how lobbying has evolved in the Trump era. No other text or reader provides the breath of coverage or the strength of detail in exploring the world of organized interests, from their internal structure to their electoral politics to their lobbying activities. The talented scholars in this edition, like those in previous volumes, continue to seek answers to a host of questions as to how groups evolve, how they compete with similar groups, how they influence elections, and how they lobby—across a wide range of issues.