After three years of teeth-gnashing about the “shredding of norms,” much of Washington has decided that “process complaints” are invalid. We’ve joined other Beltway media in worrying about President Trump’s regular disregard for the normal way of doing things, but unlike some of our colleagues, we also worry when the Democrats just make up the rules as they go along. Democrats are increasingly revealing their impeachment efforts as simply a partisan assault aimed at weakening Trump ahead of the 2020 elections. In approving its ground rules for impeachment, Democrats dashed all hopes they would engage in a serious effort, with due process, to investigate Trump’s wrongdoing. The most obvious sign of Democrats’ unseriousness is the man they put in charge of the investigation. The House Democratic caucus has 233 members. In a group that large, many members will be role-players. Some members are serious policymakers. Some are mostly communicators. Some are deal-makers. Adam Schiff’s value to his party is his willingness to be a partisan attack dog who is willing to baldly speak untruths to the television cameras. It is normal and expected for Speaker Nancy Pelosi to have Schiff play a role. But to put Schiff in cha...