In most places Mr. Prosser is on the defence. He improves in his areas of strength by less than Ms. Kloppenburg does in her areas of strength. More Bush counties move leftward; fewer Kerry counties move rightward.
The great exception, however, is Milwaukee. In that Democratic stronghold Mr. Prosser improved by double-digits over Mr. Bush. Ms. Kloppenburg almost makes up the difference through a massive improvement in Madison (Dane County), the other Democratic stronghold, along with a respectable performance outside Milwaukee and its suburbs. But she doesn't quite make it.
...snip...
Much of Mr. Prosser's improvement was due to poor minority turn-out.
Milwaukee is the type of Democratic stronghold based off support from poor minorities (Madison is based off wealthy white liberals and college students). Unfortunately for Ms. Kloppenberg, minority turn-out is generally low in off-year elections such as these.
http://www.swingstateproject.com/diary/8705/analyzing-the-2011-wisconsin-supreme-court-election