In a significant escalation of its immigration enforcement campaign, the Trump administration has sued Illinois, Cook County, and Chicago, alleging that their sanctuary city policies obstruct federal immigration law enforcement. The 22-page lawsuit targets Illinois' Trust Act, Chicago's Welcoming City Ordinance, and Cook County's immigration policies, claiming they impede communication necessary for effective enforcement. Governor JB Pritzker and Chicago Mayor Brandon Johnson have pledged to defend these laws, asserting they prioritize community safety. This legal action reflects the Trump administration's broader strategy to challenge sanctuary jurisdictions, which it argues harbor criminals, amidst rising tensions over immigration policy.