Illinois Gov. JB Pritzker speaks at a news conference in Chicago on Oct. 6, 2025. Chicago Mayor Brandon Johnson stands at right. (Photo by Scott Olson/Getty Images)

A federal judge will hear arguments Thursday in Illinois over Chicago’s lawsuit challenging President Donald Trump’s deployment of National Guard troops to the state before deciding whether to block the move, the judge wrote in an order.

In a one-paragraph order, U.S. District Judge April M. Perry, whom Democratic President Joe Biden appointed to the bench, set an 11:59 p.m. Wednesday deadline for the Trump administration to respond in writing to the suit filed by the Democratic leaders of Illinois and its largest city, which they filed Monday morning. 

Perry did not immediately grant the restraining order Gov. JB Pritzker and Mayor Brandon Johnson sought to block the deployment at the outset of the case.

Perry said she expected the federal government’s response to include evidence about when National Guard troops would arrive in Illinois, where in the state they would go and “the scope of the troops’ activities” once there. She set oral arguments for 11 a.m. Central Time on Thursday.

The suit seeks to stop Trump’s federalization of Illinois National Guard and mobilization of Texas National Guard troops to the state. Texas Gov. Greg Abbott, a Republican, has also agreed to send Guard troops to Portland, Oregon, at Trump’s request.

Pritzker and Johnson’s complaint calls the federalization of state National Guard troops “illegal, dangerous, and unconstitutional.” The Democrats added that the move was “patently pretextual and baseless,” meaning it could not satisfy the legal requirements for a president to wrest from a governor control of a state’s National Guard force.

Pritzker, appearing at a Tuesday event in Minneapolis with Minnesota Gov. Tim Walz said the federal government has been noncommunicative about the plan for the National Guard troops, but had received “reports” that troops have arrived at a federal facility in the state.

“We don’t know exactly where this is going to end,” he said. “What we know is that it is striking fear in the hearts of everybody in Chicago.”

A federal judge in another case blocked the deployment to Portland after city and Oregon leaders sued to stop it. The federal government appealed that order, and a panel of the 9th Circuit U.S. Court of Appeals will hear oral arguments Thursday, according to a scheduling notice posted Tuesday.

Insurrection Act cited by Trump

Trump has said the extraordinary use of troops, which raises serious legal and constitutional questions about the line between military forces and domestic law enforcement, is necessary to control crime in some Democrat-led cities, including Chicago and Portland. 

State and local leaders in those jurisdictions, as well as Los Angeles, have said military personnel are not needed to supplement local police. Pritzker called the proposed deployment to Chicago an “invasion.”

Trump indicated Monday he may seek to further escalate the push for military involvement domestically, saying he would have no qualms about invoking the Insurrection Act, which expands presidential power to use the military for law enforcement.

“We have an Insurrection Act for a reason,” he told reporters. “If I had to enact it, I’d do that. If people were getting killed and courts were holding us up or governors or mayors were holding us up, sure, I’d do that.”

Democratic U.S. Sens. Tammy Duckworth and Dick Durbin of Illinois, Jeff Merkley and Ron Wyden of Oregon and Alex Padilla and Adam Schiff from California — the three states where Trump has sent troops over the governors’ objections — called on Trump to withdraw the troops in a Tuesday statement that warned of the escalating conflict between blue states and the federal government.

“Donald Trump is stretching the limits of Presidential authority far past their breaking point and moving us closer to authoritarianism with each dangerous and unacceptable escalation of his campaign to force federal troops into American communities against the wishes of sovereign states in the Union he is supposed to represent,” the senators wrote.

Dems in Congress question raid

Trump’s use of National Guard troops is in part a response to protests in Democratic cities over this administration’s crackdown on immigration enforcement.

Trump has surged immigration enforcement officers to certain cities. Those agents have pursued sometimes aggressive enforcement, including a Sept. 30 raid on a Chicago apartment building that has been criticized for using military-style tactics.

A group of eight U.S. House Democrats wrote Monday to Attorney General Pam Bondi and Homeland Security Secretary Kristi Noem calling for an investigation into that raid.

The members were Homeland Security Committee ranking member Bennie Thompson of Mississippi, Judiciary Committee ranking member Jamie Raskin of Maryland, J. Luis Correa of California, Pramila Jayapal of Washington, Shri Thanedar of Michigan, Mary Gay Scanlon of Pennsylvania and Delia Ramirez and Jesús “Chuy” Garcia of Illinois.

“We write to express our outrage over the immigration raid,” they said. “Treating a U.S. city like a war zone is intolerable.”

J. Patrick Coolican contributed to this report.