With his new book, Stanley Kurtz has done what the media refused to do — finally vet the president and his radical past, two years too late to prevent him from becoming president, but just in time to issue a restraining order on him next Tuesday. Yet people seem to be under the misapprehension that in order to be a Marxist, one has to be as explicitly so as the president has been with his deliberate associations with socialist and communist organizations and individuals. But Marxism isn’t a doctrine so much as an attitude. It is founded on a couple...