Why is Perry but not Romney or Cain beating Obama in the Rasmussen poll of Wisconsin voters?

Perry beats Obama, 46%/54%, but Obama beats Romney, 45%/41%, and Cain, 47%/42%.

I just don't get it. What's getting Perry those extra 4 or 5 percentage points here? Something about the empathy toward immigrants? The HPV vaccine? Is Wisconsin harboring some anti-Mormon or anti-black folks?

I genuinely don't know, and I also wonder what it might say about the recall effort against Scott Walker.

ADDED: Rasmussen has a new poll about Walker:

The latest Rasmussen Reports telephone survey of Likely Wisconsin Voters shows that 38% Strongly Approve of the job Walker is doing, while the same number (38%) Strongly Disapproves. Overall, the Republican governor earns positive reviews from 49% and negative grades from 49%....

Walker’s overall ratings have improved since March, when 43% approved of his performance and 57% disapproved.  At that time, 34% Strongly Approved of the job he was doing and 48% Strongly Disapproved....

While 55% of male voters in the state like the job the governor's doing, 55% of female voters disapprove of his performance. 

What's with the sex divide? Well, that's not special to Wisconsin, is it? The Perry thing... that's what's puzzling.

Most voters under 40 disapprove of Walker, while the majority of their elders approve. Married voters and those with children in the home are more likely to approve of the governor's performance than are unmarrieds and those without children. 

These kids today!

Now, here is the most interesting statistic:

Just four percent (4%) of Wisconsin voters rate the U.S. economy as good or excellent, while 60% describe it as poor. Fifty-seven percent (57%) of those who think the economy is poor give Walker favorable marks.