A PPP poll shows that Obama beats all Republican comers in Wisconsin in 2012 (Palin, Romney, Huckabee, Gingrich), but that's not a surprise to anyone who looked at the WPRI's post-election poll showing Obama had a 53% job approval rating.
Indeed, fully 18% of Republicans gave him a favorable rating.
Sykes et al like to talk about Obama's cratering popularity. In Wisconsin, maybe not so much. It's worth noting that Obama's much demagogued health care plan (Sykes was out early with the Death Panel charge) has only 40% approval, but, then again, that's only 5 points less than Walker's.