Ben Carson's presidential campaign is many things. A curiosity, an oddity, a fascinating yet disturbing commentary on today's Republican Party? Absolutely. But there's also some reason to believe that it's a giant confidence game. That isn't to say that Carson isn't genuinely trying to become president. He has even moved into the lead in a couple of recent national polls. But the inner workings of his campaign will look awfully familiar to those who understand how one right-wing movement has been bilking gullible conservatives over the last half-century. Like many outsider candidates, Carson is relying on small donors to raise...