Since taking office in January, Trump has enlisted hundreds of state and local law enforcement agencies to help identify immigrants in the U.S. illegally and detain them for potential deportation. U.S. Immigration and Customs Enforcement now lists 640 such cooperative agreements, a nearly fivefold increase under Trump.
Trump also has lifted longtime rules restricting immigration enforcement near schools, churches and hospitals, and ordered federal prosecutors to investigate state or local officials believed to be interfering with his crackdown on illegal immigration. The Department of Justice sued Colorado, Illinois and New York, as well as several cities in those states and New Jersey, alleging their policies violate the U.S. Constitution or federal immigration laws.