Interest Group Politics has been and will continue to be the leading (essentially only) comprehensive collection of articles on interest groups and lobbying. The authors provide a theoretical overview of the subject, and address groups as organizations, as coalitions, as electoral actors, and as lobbying entities, broadly conceived. 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. Fresh studies examine how lobbying has evolved in the Trump era, as well as offer classic analyses of how groups organize and seek to affect public policy.