Hillary replacing Joe on the ticket in 2012 is becoming an interesting piece of beltway gossip. Then yesterday I had lunch with someone who’s connected in those circles and, frankly, just knows stuff, and she offered this nugget: “What if Hillary not only resigned from State after midterms and announced her challenge to Obama in 2012, but also named a running mate? Someone steady and moderate, like Evan Bayh. They would campaign together as a ticket from Day 1.”