Daily Kos has the official PPP poll results:
An enormous enthusiasm gap, coupled with a Republican nominee fresh from a decisive primary win and unsullied by the primary process, has catapulted Republican nominee Ron Johnson to a double-digit advantage over incumbent Democrat Russ Feingold, according to PPP’s poll of the state on behalf of Daily Kos.
In November of 2008, then-candidate Barack Obama swept through the Midwest, winning many states (including Wisconsin) by double digits. Today, the President’s numbers are nearly reversed in the Badger State: whereas Obama carried the state 56-42 in 2008, his job approval now is 41%, with 54% expressing disapproval. This is a tendency that has been mimicked throughout the Midwest, and may well explain why this region seems to be the one vexing Democrats the most this cycle.