At this stage, that seems unlikely. But Politico is reporting that internal polls from both Mr. Perry and Mitt Romney find significant slippage in Newt Gingrich's Iowa standing. And Perry is one of the beneficiaries. "I believe [Ron] Paul can trip up Newt here, and that's great news for Romney because Newt is done if that happens," one Iowa caucus-watcher told Politico. "Watch Rick Perry. He's going for a top-three finish, and that could be to Romney's expense." How well do you know Rick Perry? Take our quiz Perry's strategy amounts to betting everything on Iowa, where he's making a...