James B. Comey’s lawyers are expected to argue that the Justice Department effectively allowed itself to be taken captive by the president’s desire for political revenge.
The outcome could have serious consequences for the cases against two of President Trump’s opponents, James B. Comey, the former F.B.I. director, and Letitia James, the New York attorney general.
The pardons of former Trump aides, which would only apply in federal court, are largely symbolic and cannot shield them from continuing state-level prosecutions.
The investigation into Muriel E. Bowser, which is being handled by the U.S. attorney’s office in Washington, could face significant hurdles because of the known facts of the case and recent turmoil inside the Justice Department.
The flashpoint was the Justice Department’s failure to turn over seized communications from a confidant of Mr. Comey’s, Daniel C. Richman, a law professor at Columbia University.
The filing appeared to be an effort to construct a narrative that James B. Comey had leaked information to the news media without actually tying such assertions to the claims made in the indictment against him.
Few places have felt the effects as palpably as the U.S. attorney’s office in Washington, which is deeply enmeshed in the workings of government and has filed criminal cases against President Trump.
The prosecutors were put on leave after filing a sentencing memo in the case of a man who showed up armed near the home of former President Barack Obama.