Perhaps the quickest way to get a post-presidency Trump out of our hair is to extradite him to a country where he has been convicted of a crime. It can't be random, however, as a) the country has to have a valid extradition treaty with the US, and b) the extradition review has to meet objective standards for extradition laid down by the UN. A large financial fraud would probably meet these standards. Somebody in the US government still knows what countries are possible, but the State Department no longer updates its website, because, well, who would need that useful information? The only people interested are probably "invaders" anyway. BTW: The US seems to have abandon worrying about extradition treaties in 1996, so it never go around to an extradition treaty with Ukraine. Uzbekistan, however, in the process of updating its extradition treaty, so there's hope.