Assuming Hillary is his running mate (which I think he would have wanted, ironically), and he still runs a populist campaign that has broad appeal to the WWC, I could see something like this:
Evangelical leaders are strongly against him (also ironically) which prevents him from winning more in the South and probably Indiana (Obama had unique appeal there too), but not so much in other Appalachian and Midwest states, which were suffering economically, would have been drawn to Trump’s message, and (especially in the case of Arkansas) would have welcomed Clinton as VP.