He won't win MI or certainly WI (I'd get ready to defend IA before WI, and if I were she I'd be all in on OH), but if he can land OH, it's going to be something like the 2000 map, in all likelihood, so the fact that she's getting ready to play defense in that region makes a lot of sense. This is realistically her last shot at the Presidency, so she's taking the high ground as she should. And if any GOPer could make PA close, it's Trump.
Someone like Kasich would have a far better shot at flipping PA than Trump.