A federal appeals court announced Friday that it will hear arguments on Sept. 15 in Richmond, Virginia, over the Trump administration’s effort to revive criminal cases against former FBI Director James Comey and New York Attorney General Letitia James.

The development marks the latest escalation in the Justice Department’s fight to revive the cases against Comey and James, which were separately brought by former interim U.S. Attorney Lindsey Halligan. A judge dismissed both cases last fall, ruling that Halligan had been unlawfully appointed after the White House stalled on submitting her official nomination to the Senate for confirmation.