It is well-established—through longstanding Supreme Court precedent—that the U.S. Constitution prevents the federal government from commandeering states to enforce federal laws. While the federal ...

Massachusetts Attorney General Andrea Campbell joined attorneys general from 10 other states in declaring that local and state police can't be commandeered to enforce federal immigration law.

A DOJ memo says state and local officials who do not align with President Trump's crackdown on immigration enforcement could face criminal penalties.