Despite Dragon's decent response, it is far from clear what the outcome would be where the vote to have been stopped.
It's also false to suggest that the laws are clear enough to disambiguate these situations.
At very least, there would be a constitutional legal war the likes of which the country has never seen.
But most importantly - the issue is one of populism: if 1/3 of the country does not believe the results of what was by all accounts an unambiguous outcome - and were capable of literally stopping the process - then it 'doesn't matter what the law is' because already the system will have gone beyond objective reality and due process. It's Game of Thrones then.
OTOH, one should not ignore conspiracy theories if one is trying to explain the actions of Q cultists.
Just because there is a clear reality doesn’t mean that every actor is motivated by that rather than a distorted, conspiracy-theory driven one on which fringe or outright untenable theories of law are among the basic operating premises.
We have a well-established process with clear steps which apply in good times and bad times, whether any of the players like them at the moment or not.
It's not tough but people have to discard their conspiracy theories in favor of facts, laws, and reason.