A bit too much cheerleading and "Look, you still have a chance to do something about this, Dems!", but the basic premise is solid. Voters who supported insider Republicans (who lost) are not likely, on the whole, to support Democrats out of spite. More than likely, they will take a breath, think it over, and support the nominee of the party. Democrats may have a slightly better chance with O'Donnell than they would have with Castle, but they are still at the bottom of a very tall credibility hill trying to push Obamacare and the Stimulus, like Sisyphus, back up the slope.