Just coming in over the wires: guess the Senator wasn’t willing to serve one more term. Surprising, actually.
As to my list of vulnerable 2014 Senators: he was Low Risk, largely because I figured that the only way he’d leave was if Levin was tapped for a Cabinet post. But a retirement works, too. Bad news for Democrats, because that’s going to be an expensive seat to keep…
*I’d say ‘cuts and runs,’ except that this may be health-related (no personal knowledge, but he’s not looking so hot), and I do have SOME scruples.