The 250th anniversary of the US Army is a legitimate cause for commemoration. So is the birthday of an American president, at least for his friends, family, and supporters. We learned last weekend why those two celebrations should probably not have been combined. As we discussed here last week, Donald Trump is a master of distraction. When the conversation is going against him, he is extremely talented at changing the subject. Seven days ago, when we were still fascinated by his breakup...