Interesting Nate Silver post on how the bunching up of Gingrich, Santorum, Bachmann, and Perry could produce a last-minute break for one of them if he/she is perceived, at the end, as more viable than the others.
Meanwhile, Alex Burns has a piece on Santorum’s good day. He could have added the resignation of Bachmann’s Iowa chairman to his list.
UPDATE: Byron notes the potential for Santorum to soar if the other social-conservative candidates begin to tail off.
The one and only.