Yep....Feingold won Dane 70-30 in 2010 and lost....
2004 Wisconsin Presidential Results
This is useful because it was a 50-50 race and the link has percentages by county. So you can compare how a 50-50 race went by county in Wisconsin. You can also look at turnout, as in what percent of the 2004 turnout is being seen in each county.