The state of Illinois and the city of Chicago sued the Trump administration on Monday, contesting the federalization and deployment of National Guard members to the area.
The lawsuit argues that the move is unlawful, unconstitutional, and politically motivated, targeting Democrat-led cities amid protests against the government's immigration policies.
Filed in a U.S. District Court in Illinois, the complaint names President Donald Trump, Department of Homeland Security Secretary Kristi Noem, and Department of Defense Secretary Pete Hegseth as defendants.
It seeks an emergency restraining order to halt the deployment of 300 Illinois National Guard troops authorized to protect federal officers and assets in Chicago, as well as 400 Texas National Guard members planned for Illinois and other locations.
The suit also requests a broader declaration that such federalizations are illegal.
Illinois Governor JB Pritzker and Chicago Mayor Brandon Johnson condemned the action, describing it as an invasion and a show of intimidation rather than a measure for public safety.
Pritzker stated that the deployments do not enhance safety and instead sow fear and division.
The lawsuit follows recent sightings of masked federal immigration officials in tactical gear marching through downtown Chicago, including areas like Michigan Avenue and Millennium Park frequented by tourists and residents.
State Attorney General Kwame Raoul emphasized that no president can flout the Constitution.
This legal challenge mirrors similar suits in states like Oregon and California, where officials argue Trump lacks legal authority to federalize troops without conditions like invasion or rebellion.
The administration's strategy reprises tactics used in Los Angeles and Washington, D.C., prompting widespread criticism from Democratic leaders.