This will only happen if the ‘rats see that ‘bammers is going to lose in a huge landslide and take most of them with him.
THEY’LL be the ones that push for him to be disqualified so they can get another candidate on the ballot.
They did something like this in NY, IIRC, when their candidate was imprisoned, and they got some judge to rule that it wouldn’t be fair to enforce the election rules that the replacement candidate had to meet filing deadlines.