The United States is entering a new era of progressive state citizenship, with California leading the way. A growing number of states are providing expanded rights to undocumented immigrants that challenge conventional understandings of citizenship as binary, unidimensional, and exclusively national. In Citizenship Reimagined, Allan Colbern and S. Karthick Ramakrishnan develop a precise framework for understanding and measuring citizenship as expansive, multi-dimensional, and federated - broader than legal status and firmly grounded in the provision of rights. Placing today's immigration battles in historical context, they show that today's progressive state citizenship is not unprecedented: US states have been leaders in rights expansion since America's founding, including over the fight for black citizenship and women's suffrage. The book invites readers to rethink how American federalism relates to minority rights and how state laws regulating undocumented residents can coexist with federal exclusivity over immigration law.