This is the first and only comprehensive, book-length political history of national ID card proposals and developments in identity policing in the United States. The book focuses on the period from 1915 to 2016, including the post-9/11 debates and policy decisions regarding the introduction of technologically-advanced identification documents. Putting the United States in comparative perspective and connecting the vital issues of immigration and homeland security, Magdalena Krajewska shows how national ID card proposals have been woven into political conflict across a variety of policy fields. Findings contradict conventional wisdom, debunking two common myths: that Americans are opposed to national ID cards and that American policymakers never propose national ID cards. Dr Krajewska draws on extensive archival research; high-level interviews with politicians, policymakers, and ID card technology experts in Washington, DC and London; and public opinion polls.