This invaluable resource investigates U.S. immigration and policy, making links the ethnic and religious affiliations of immigrants to the United States to trends in immigration, both legal and unauthorized. U.S. Immigration Policy, Ethnicity, and Religion in American History is rich with data and document excerpts that illuminate the complex relationships among ethnicity, religion, and immigration to the United States over a 200-year period. The book uniquely organizes the flow of immigration to the United States into seven chapters covering U.S. immigration policy making; the Open Door Era, 1820-1880; the Door Ajar Era, 1880-1920; the Pet Door Era, 1920-1950; the Dutch Door Era, 1950-1985; the Revolving Door Era, 1985-2001; and the Storm Door Era, 2001-2018. Each chapter analyzes trends in ethnicity or national origin and the religious affiliations of immigrant groups in relation to immigration policy during the time period covered.