Maybe Wisconsinites just like incumbents. Seriously, what's going on there? We've got Obama 8 points ahead of the supposedly kind of moderate Romney, yet the supposedly staunchly conservative Walker is beating all the potential Democratic opponents?
Looking through to the full results — PDF — it's interesting that on the right direction/wrong track question, 70% of the respondents think the country is on the wrong track (24% say "right direction"), but when the same question is asked about Wisconsin, 50% say "right direction," and 46% say "wrong track."
There is a demand for something and it ain't more liberal cowbell.