Rep. Doug Collins, R-Ga., had a testy exchange Wednesday with a Justice Department whistleblower who admitted during a House Judiciary Committee hearing that he sought to work House Democrats during the Trump impeachment proceedings. John Elias, a senior career official in the Justice Department’s antitrust division, is one of two whistleblowers who testified before the Democrat-led committee on alleged politically-motivated overreach by Attorney General William Barr and other appointees. During his testimony, Elias accused his supervisors of improperly investigating mergers involving cannabis companies because of a “personal dislike of the industry.” Collins questioned Elias on his own political background, asking...