Immigration law shapes and regulates a nation's membership boundaries. It defines who may lawfully enter, reside, and become a citizen of a given polity, and according to what criteria. This course explores the legislative framework governing immigration and naturalization to the United States (the Immigration and Nationality Act), the sources of the federal immigration power, the major admission categories and procedures, deportation and removal, human trafficking concerns, and recent developments in immigration law as it intersects with homeland security and temporary admission programs. At the theoretical level, it analyzes the reasons behind the global-attraction power of the United States, the political economy of international migration, and the impact of globalization on the regulation of cross-border flows of people.