I suspect Wisconsin is a “blue” state compared to Indiana mainly because its population is dominated by the one large urban area (Milwaukee) and a major leftist university town (Madison). Indiana is more of a Rust Belt state — but with enough of a pro-business environment that it doesn’t have the same tired socio-economic climate as its neighbors.
I was just calling WI blue because they’ve voted Democrat in the presidential elections for quite awhile now. Senator Feingold doesn’t really help, either.
BO won in WI in a NC-like margin - an IN win can’t be legit - Gary is too close to the cradle of the Democratic machine.
The most conservative part of Wisconsin are the Milwaukee suburbs. The rural part of the state outside Milwaukee is liberal, much like Minnesota.
Indiana is a much, much more conservative state than Wisconsin. Even so, Obama won Wisconsin at the height of his Obamessiah period.