Rick Santorum's taken a large lead in Michigan's upcoming Republican primary. He's at 39% to 24% for Mitt Romney, 12% for Ron Paul, and 11% for Newt Gingrich. Santorum's rise is attributable to two major factors: his own personal popularity (a stellar 67/23 favorability) and GOP voters increasingly souring on Gingrich. Santorum's becoming something closer and closer to a consensus conservative candidate as Gingrich bleeds support. Santorum's winning an outright majority of the Tea Party vote with 53% to 22% for Romney and 10% for Gingrich. He comes close to one with Evangelicals as well at 48% to 20% for...