In its lawsuit, filed Thursday, the U.S. Department of Justice says Chicago’s Welcoming City Act, Cook County’s Ordinance 11-O-73 and Illinois’ Way Forward Act allegedly discriminate against the

The federal lawsuit is the first by Trump's Justice Department against states or municipalities that have sanctuary city policies.

The lawsuit argues that the U.S. Constitution’s Supremacy Clause “prohibits Illinois, Chicago, Cook County, and their officials from obstructing the Federal Government’s ability to enforce laws that Congress has enacted or to take actions entrusted to it by the Constitution.”