Kevin Drum was rooting for an O'Donnell victory:
The die has been well and truly cast here for some time: the GOP is irrevocably committed to the undiluted Fox/Limbaugh/Drudge party line, and there's no going back. They're either going to stand or fall on that. So I say: let 'em do it. No excuses, no scapegoats. Finish up the Texification of the Republican Party and see how it goes. Only then is there any hope of a return to common sense.
In the short-term, [the Castle loss will] be good news for progressive politics but as I said yesterday I don’t think that kind of narrowly partisan thinking gets you very far in the long run. Ultimately, the two-party system operates near equilibrium, and so the internal state of both parties counts. It’s better for progressives and better for the country for Republicans to field strong, reasonable candidates.