The Trump administration's immigration lawsuits against so-called "sanctuary" jurisdictions pits the Justice Department against the doctrine of federalism, formerly a bedrock principle of conservative ideology.
Read MorePresident Trump says self-styled "sanctuary cities" are breaking the law. But are cities under any actual obligation to enforce federal immigration law? And is there any evidence for Trump's claim that sanctuary status is linked with higher incidence of crime?
Read MorePresident Trump says self-styled "sanctuary cities" are breaking the law. But are cities under any actual obligation to enforce federal immigration law? And is there any evidence for Trump's claim that sanctuary status is linked with higher incidence of crime? David answers these questions and explains why many local law enforcement agencies want nothing to do with immigration enforcement.
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