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.”

The Trump Administration filed a lawsuit Thursday against Chicago, Cook County and Illinois over its sanctuary policies that prohibit local law enforcement from coordinating with federal immigration officials.

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