It is the most famous ducktail in America today, the hairdo of wayward youth of a bygone era, and it's astonishing to imagine it under the spotlight in Cleveland, being cheered by Republican dignitaries. The class hood, the bully and braggart, the guy revving his pink Chevy to make the pipes rumble, presiding over the student council. This is the C-minus guy who sat behind you in history and poked you with his pencil and smirked when you asked him to stop. That smirk is now on every front page in America. It is not what anybody — left, right...