The Trump administration sued Chicago on Thursday alleging that 'sanctuary' laws in the nation's third-largest city “thwart" federal efforts to enforce immigration laws. The lawsuit, which also names the state of Illinois,

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.”