The course focuses on the answers to three principal questions: who is a citizen of the United States?; who else can come to this country as an immigrant or a visitor?; and when and why can non-citizens in the United States be forced to leave? These questions will prompt us to examine these further topics: the history of immigration to the United States, the constitutional rights of non-citizens, the federal agencies that administer the immigration and citizenship laws, undocumented immigration, and the balance between national security and openness to non-citizens. As these topics imply, the course is part of the study of outsiders in American society, and thus belongs to the civil rights areas of the public law curriculum. Beyond the subject matter per se, the course is an opportunity to learn and apply general principles of constitutional law and administrative law in a substantively focused setting. It also is an opportunity to practice statutory interpretation skills in a complex, technical context, and to look closely at the interaction between statutes and the U.S. Constitution.