Introducing the conflicted politics of localized immigration control -- The evolution of devolution -- The problematic patchwork of immigration federalism -- Going their own way : community context and its influences on the patchwork -- Discretion on the front lines : immigrant policing in action -- Negotiated understandings between law enforcement and local communities -- Conclusions and recommendations : finding the way forward -- Appendix: Multivariate analyses of policing practices and local government policies.