With Trump flipping MI (possible but unlikely with current polling), OH (likely because polls underrate Trump), and FL (possible) and the Romney/Obama 2012 map otherwise, the EC is tied 269-269. I don't think PA or WI would flip republican. Don't know of other states likely to flip (maybe IA? very white state). Holding Romney's red states is the big if due to Trump being an assclown, but there are lots - lots - of people sick and tired of Obama.
Flipping those three though is something I see as very possible. I can never have faith in Michiganians to do anything right, because Michigan sucks.