In a rare unsigned order on December 23, 2025, the U.S. Supreme Court halted President Trump’s plan to federalize National Guard troops to the Chicago area, leaving in place a lower-court injunction that blocks hundreds of guardsmen from entering the region. The ruling means the deployment cannot proceed for now.
The decision involved the Trump administration, the U.S. Supreme Court justices, and Illinois state and local officials, including Governor JB Pritzker and Chicago-area leaders, who opposed the move. The Court ruled that the government failed to identify a valid statutory authority to federalize the National Guard to enforce laws in Illinois, a threshold requirement before troops could be used domestically.
Three justices dissented: Clarence Thomas, Samuel Alito, and Neil Gorsuch.
Illinois officials welcomed the decision as a victory for state sovereignty and American democracy, arguing that federal troops should not be deployed without clear statutory authority.
What happens next? The deployment remains blocked for now. The Trump administration could pursue further legal avenues or await new circumstances or authorities that would justify federalizing the National Guard in Illinois.
This ruling underscores the ongoing legal scrutiny surrounding the domestic use of federal troops and the balance of power between federal and state authorities.
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