The problem with the Democrats’ impeachment gambit—aside from the fact that it appears to rest largely on a complaint riddled with inaccuracies, falsehoods, and hearsay—is that the American people don’t trust Congress and will likely have little confidence in any impeachment process undertaken by Democratic congressional leaders.And no wonder. Ever since President Trump won the presidency in 2016, Democrats have been grasping for some pretext to invalidate the results of that election.First, it was the outlandish claim that if Trump didn’t liquidate his global business interests upon taking office, he would be in violation of the emoluments clause. Then...