I mean, there are multiple counties in KY that gave Bobo single-digit percentages in the 2008 primaries. In 2012, 42% of Democratic voters checked off uncommitted on their ballot.
It's all ground game, and ground game is money. IF CO, IA, NH, NH are all reliably, consistently internally +3 in the clear, then yeah, go after PA. But WI would be smarter. PA is more a resource game -- if Bobo is broke and -$15M to BoA, then make them go deeper.
Here in CO, O has been carpet-bombing the state with ads since the late summer. R&R has been spending big bucks here and its a commercials dog-fight. I think R&R have the upper hand.