I had said a couple of times that Deval Patrick's approval rating was bad enough that, even in Democratic Massachusetts, he could face trouble if the GOP finds a credible challenger.

I was apparently wrong about the "credible" requirement.  The latest Rasmussen Reports poll finds that Patrick trails businessman Christy Mihos by 1 point (41%-40%), and leads Charlie Baker by 5 points (36%-41%).  Mihos got 7% of the vote in 2006 running as an independent, and Charlie Baker's resume includes "Health Care Corporation CEO" and "Ex-Gubernatorial Aide."

In fairness, Mihos has run a statewide race, and Baker has been involved in politics for a while.  But having never held elected office, as Republicans in Massachusetts, they shouldn't be holding a Democratic incumbent to 40% of the vote.  Very grim for Patrick right now.