It appears to be the first Justice Department lawsuit against local officials for allegedly interfering with the Trump administration’s immigration crackdown.

Federal officials are asking a judge to bar the Illinois, Chicago, Cook County and the Cook County Sheriff from using local laws that protect migrants to hamper law enforcement.

The U.S. Department of Justice (DOJ) filed a federal lawsuit on Thursday against the state of Illinois, the city of Chicago, Cook County, and the Cook County Sheriff’s Office, alleging that local laws are obstructing the Trump administration’s efforts to enforce federal immigration policies.