University of Virginia political guru Larry Sabato thinks that former Massachusetts Gov. Mitt Romney's potential BFF in the race for the GOP presidential nomination could be no other than Rep. Michele Bachmann, the hard-charging conservative from Minnesota. The reasoning is that Mrs. Bachmann's possible entrance into the race could throw a serious roadblock on former Minnesota Gov. Tim Pawlenty's perceived path to victory, which starts with a win or — at the very least — a strong showing in Iowa. Mrs. Bachmann "could torpedo Pawlenty's chances," Mr. Sabato writes in his latest rundown of the GOP field. "Bachmann has a...