I’m going to reject your counter factual here. Assuming that Trump is still the same person and held the same positions he never would have received the nomination from the Democratic party because of his insistence on the whole birther thing. Obama was still too popular with the Democratic base to allow Trump to get the nomination. He’d have to have a radical different set of positions in order to overcome that deficit. However, that’s outside of boundaries of this scenario. So there is simply no way for him to have received the Democratic nomination.