It just doesn't seem like there's a good Dem who is strong enough to pull together the party here. Everything is so fractured. As it stands, I see a really low turnout on the Dem side for the primary and things not pulling together before the general. Walker could win just because the Dems can't get their act together at the state level.
I'm also terribly afraid for Tammy Baldwin. She's done excellently, but if the Dem turnout is low because of the previously mentioned governor mess, she's toast.
I think Baldwin will be fine. crossover appeal(?)