This much is obvious: South Carolina has proven to be a disaster for Mitt Romney. The size of his defeat by Newt Gingrich -- a 12%+ landslide in a four-way race --- is virtually a repudiation of his candidacy in a state that has prided itself on picking the eventual nominee for 32 years. And we suspect Romney will have several more nights of heartburn, much like this one, as the nomination unfolds. Snip Gingrich's win brings to a halt any prospect Romney had for ending this contest with a win in Florida on Jan. 31. What Gingrich now needs...