Join an orderly queue....There are mechanisms, but they’ve all been built around the idea of a batshit President being surrounded by rational actors. When the entire deck is stacked with fruitcakes and crazies there’s not a lot of places to go.
I fear the only way we will be rid of Trump is if someone chooses the John Wilkes Booth method of writing their name into history.
But sadly, there will be any number of cosplay Trumps to carry on the mission.
Large amounts of money to be made by rigging the markets by presidential decree, then pardoning one's self, is an attractive option.
To a certain type.