The Trump administration, alongside the Justice Department, has filed multiple lawsuits against the state of Illinois, the city of Chicago, and Cook County, challenging their sanctuary laws and immigration policies that allegedly obstruct federal enforcement efforts. The administration asserts that these sanctuary protections for undocumented immigrants hinder attempts to enforce immigration laws and constitute an intentional effort to thwart federal actions. This legal battle reflects ongoing tensions between federal and local governments regarding immigration enforcement, with many Illinois officials vowing to push back against these lawsuits.