I do wonder why Wisconsin seems to be so strongly in her camp. Perhaps Ted Cruz's victory there was somehow illuminating? I always thought Wisconsin was rather conservative outside of the major cities and it's certainly lily-white enough where you think Trump would be doing very well there.
Wisconsin Republicans really don't like Trump, and Wisconsin Democrats like Hillary well enough.
Also, WCWs in Wisconsin (and Minnesota) have stuck with the Democratic Party when they abandoned it elsewhere. This is why WI was among the Dukakis Five. Wisconsin has been a focal point for right-wing union busting, and labor Democrats still have a lot of solidarity as a result.
If someone like Mike Pence were heading the ticket, however, WI would stand a good chance of flipping.