Newt Gingrich's surge following his South Carolina victory doesn’t seem to have lasted long. According to a new CNN poll, Mitt Romney and Gingrich are essentially tied. Other polls have shifted as well. The New York Times' Nate Silver projects that Romney has a 52 percent chance of winning, compared with Gingrich’s 48 percent. The biggest shift comes form Insider Advantage, which had Gingrich leading by 8 points on Sunday—and now has Romney leading by 8. Meanwhile, Gingrich pitched another “grandiose” idea by saying that by the end of his second term, the U.S. would have a permanent base on the moon, an idea that seemed to go over well with space coast voters.