Appeals court weighs legality of Trump's National Guard deployment in Washington, D.C.

Why it matters

The U.S. Court of Appeals for the District of Columbia Circuit heard arguments on Wednesday, October 14, on the legality of President Donald Trump's deployment of National Guard troops in Washington, D.C. Judges pressed government lawyers on whether any real limits exist on a president's authority to send troops into the city to support law enforcement — in particular whether the deployment runs into the Posse Comitatus Act, the long-standing law restricting the use of the military for domestic law enforcement, and whether it intrudes on local officials' authority to direct policing.

The case follows a ruling last November by a federal district judge that the deployment unlawfully interfered with local officials' authority to direct law enforcement in the district; the appeals court then paused that ruling, allowing the Guard to remain in place while the case moves through the courts. The Guard has patrolled the capital's streets since August 2025 as part of a crime-fighting mission, peaking at about 5,000 troops, with the deployment expected to run through January 2029. Dozens of protesters gathered outside the courthouse Wednesday holding signs reading "Guards Out" and "Free DC".