A divided federal appeals court on Wednesday ordered the dismissal of the criminal case against President Donald Trump’s former national security adviser Michael Flynn, turning back efforts by a judge to scrutinize the Justice Department’s extraordinary decision to drop the prosecution.

The U.S. Circuit Court of Appeals for the District of Columbia said in a 2-1 ruling that the Justice Department’s move to abandon the case against Flynn settles the matter, even though Flynn pleaded guilty as part of special counsel Robert Mueller’s Russia investigation to lying to the FBI.

The ruling, a significant win for both Flynn and the Justice Department, appears to cut short what could have been a protracted legal fight over the basis for the government’s dismissal of the case. It came as Democrats question whether the Justice Department has become too politicized and Attorney General William Barr too quick to side with the president, particularly as he vocally criticizes, and even undoes, some of the results of the Russia investigation.

The House Judiciary Committee held a hearing Wednesday centered on another unusual move by Barr to overrule his own prosecutors and ask for less prison time for another Trump associate, Roger Stone. Barr has accepted an invitation to testify before the panel on July 28, a spokeswoman said Wednesday, and he will almost certainly be pressed about the Flynn case.