Acting FBI Director Brian Driscoll is on shaky ground with Department of Justice leaders for refusing to deliver the names of bureau employees involved in Jan. 6 cases and other Trump investigations. President Trump tapped Mr. Driscoll, an FBI veteran, to lead the bureau temporarily while his nominee for director, Kash Patel, goes through the Senate confirmation process. But questions remain over whether Mr. Driscoll can stay in the job before Mr. Patel is confirmed and sworn in. Acting Deputy Attorney General Emil Bove on Friday ordered Mr. Driscoll to compile a list of all current and former FBI employees...