I love the smell of bloodlust in the evening. Not every evening. Just the evenings that have Republican presidential debates. There have been five such debates so far, but only the last two of them have been considered major because they have featured Texas Gov. Rick Perry, who is leading in the polls. Except the debates haven’t really featured him. They have featured the audience. If you have ever asked yourself how crowds could have gathered to cheer public burnings and beheadings in times past, tune in to one of these debates, and you will stop asking. At a Politico/NBC...