Unlikely but possible endings:
1. Trump tries to salvage his reputation, graciously concedes defeat, and cooperates with the transition (Odds: @ same as me being elected Pope, but still not impossible).
2. He goes full Hitler-bunker, blames his base, denounces them as weak and unworthy in a final rant and shoots himself on live TV (Odds: Much more likely than #1, but the Secret Service will be prepared to intervene).