Before departing for his Thanksgiving vacation last week, President Trump teased a possible campaign visit for Roy Moore in Alabama. “I'll be letting you know next week,” he said. Trump's comments were noncommittal, but they were a marked shift from previous White House assurances that Trump wasn't going. And Trump seemed to be hinting he'd actually have something newsworthy to say. Alas, it wasn't to be. Trump is extremely self-conscious about being perceived as a loser. He talks and tweets regularly about how well Republicans have done in special congressional elections this year. He tempered his support for Strange even...