The most rational response to the news that New York City Mayor Bill de Blasio wants to be president is to ask, "Of what?" When informed that he wants to be president of the United States and not of, say, the local organic hemp co-op, perhaps the next best response would be to take a page from the South and say, "Bless his heart." One of the more charming things about de Blasio is his amiable lack of self-awareness. He seems to have no idea that he doesn't impress anybody. The obliviousness is somewhat understandable. He did get elected --...