

They don’t need a third Trump term. There are other ways to keep him in the White House that don’t mean changing the Constitution, so you’re probably right about that.
If they decide to at least pretend to be legitimate and go through the motions, they’re almost certain to nominate Vance as their candidate. Trump nominated as VP would be a declaration of intent, but not proof of the same.
What happens after that comes down to the result of the next election and where loyalties lie within the Republican party.
If the Democrats somehow win next time, there’s a good chance the Republicans will declare a state of emergency to remain in power. Trump would almost certainly remain president during that emergency, and they could spin that out indefinitely.
If the Republicans win, it will come down to how many people in the Republican party are behind Vance and want rid of Trump.



“sixpence ha’penny” would also be acceptable, if not preferable.
Source: My parents also remember pre-decimal money and I’ve heard plenty of tales.
One good story is how, on decimal day, a lot of prices went up to 240% of the original because shopkeepers simply changed the d to a p on their price labels. One old penny was 1/240 of a pound and a new penny was 1/100.