The odds-on favorite to win the GOP presidential nod in 2012 is none other than Sarah Palin, according to a statistical formula developed by Villanova University Prof. Lara Brown. The professor's figuring is bad news for presumed hopefuls like Rep. Mike Pence, Sen. Jim DeMint, ex-Gov. Mitt Romney, former Speaker Newt Gingrich, Gov. Haley Barbour, and former U.N. Ambassador John Bolton. Many simply joined the game too late, says Brown, author of the new book Jockeying for the American Presidency: The Political Opportunism of Aspirants, which studies every election since the founding. Others, like DeMint, are still brewing but won't...