This module provides a comprehensive introduction to the political system of the United States of America and to the rival theoretical accounts explaining the political outcomes this system generates. It focuses on the ideas that influence US politics, and the key actors that participate in the American political system. These actors include the President, Congress, the Supreme Court, political parties, and the electorate. It also assesses the power and influence of informal actors that affect US politics such as the media and special interest groups, as well as considering the impact of race, ethnicity, gender and religion on political participation and representation. Furthermore, the module explores the formulation of foreign policy.