Karl Rove, sometimes wrong, but always worthy of attention, writes in the WSJ: "Not long ago few thought Mitt Romney could win both the conservative Iowa caucuses and then the quirky, slightly contrarian New Hampshire primary. If he did, most assumed he would have a lock on the Republican nomination. For understandable reasons: No other GOP presidential candidate in an open race has achieved back-to-back victories in these first two contests." He concludes: "By this time next week, we'll know if Mr. Romney is 2-0. If so, he becomes the prohibitive favorite."