After trying to buy and or intimidate electoral college electors and state legislatures his denoument is the supreme court. ""Et tu Amy?""
The last hope is a Pentagon Coup but he only has some recently appointed loyalists there. Then its just him and his cell phone.

Out of power he still will have Trump TV and the Real American Taliban Militias.

ps I knew a Robert Mueller. He was the son of Heinrich Mueller the butcher of Cyprus.