Well that completes the set of all Dem senators in states that voted for Obama in 2012 (aka the Blue States).
So the question is, who is next: a Red State Dem or another Blue State Pub?
I'm betting Murkowski, then Collins, then Landrieu.
Collins I'm assuming is worried about a primary challenge. Murkowski's "evolution" should be done in a year or so. Landrieu I can see pulling a Tim Johnson and holding back so it doesn't hurt her brother's campaign (if he even runs for Gov/Sen), though she strongly implied that she supports it already. A few months after her/her brother's campaign ends, expect an endorsement from her.
