Christie takes up arms in Wisconsin's civil war

I've been to several states for Republican primaries in the past few months. Beyond partisans and political fanatics, the average, apolitical South Carolinian, Georgian or Tennessean rarely had much passion about the guys I was covering: Mitt Romney, Newt Gingrich, Rick Santorum. And then I came to Wisconsin this week, which I had read is the "most polarized state in the country." Turns out that's an accurate assessment.