The constitution is a relatively short document. It doesn't say much about treason at all, except that's it's a cause for arrest and impeachment, and Congress shall determine the punishment.

There's a lot of ways Trump can be president again; it's just that the constitution doesn't provide a path for "messed up election - reinstate previous president."

I'm all for Trump coming back. It's possible Trump is still president, so no reinstatement would be necessary. Devolution, while not specifically in the constitution, was made possible through legislation, which is in line with new elections run by the military, followed by a Trump inauguration. There are many possibilities, it's just that a simple swap of one president for another runs completely counter to all the laws currently in place.

And the law of war manual has procedures that would be applicable in the devolution scenario. It's public information, and easy to read but hard to understand.