As part of President Trump's immigration crackdown, his administration is suing Chicago and Illinois over what are known as sanctuary laws.

The U.S. Justice Department sued the state of Illinois and city of Chicago on Thursday, accusing the Democratic strongholds of unlawfully interfering with Republican President Donald Trump's crackdown on illegal immigration and seeking a court order blocking so-called sanctuary laws.

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