Look for the narcissist. The most obvious target in today’s lineup is, of course, Donald Trump. When he looks at a glass, he is mesmerized by its reflection. If Donald Trump were shaped a little differently, he would compete for Miss America. But whatever the depths of self-enchantment, the demagogue has to say something. So what does Trump say? That he is a successful businessman and that that is what America needs in the Oval Office. There is some plausibility in this, though not much. The greatest deeds of American Presidents — midwifing the new republic; freeing the slaves; harnessing the energies and vision needed to win the Cold War — had little to do with a bottom line.