No elaboration has yet been offered, by yourself or by any other poster. The limitless capacity of Republican villainy has been gestured towards, but nobody has offered a practical narrative describing how Trump would remain in office in the event of a dispute election.
It would be a mistake to assume the threat posed by Trump is that he won't leave office if roundly defeated. As we've been saying, the threat is that he will:
- forge evidence that mailed ballots are fraudulent, and use this to justify the tossing of mailed ballots and the appointment of loyal Republican electors in swing states to vote for him regardless of the popular outcome;
- shut down as many polling stations in overwhelmingly Democratic areas to cripple turnout (already happening in Texas and other states);
- have a significant edge on Election Night because his voters are far more likely to turn out in person, whereas Democratic voters are more likely to vote by mail, and then do everything in his considerable power to delay or toss the counting of mailed ballots beyond the deadline in December;
- ram through the appointment of Barrett to get a loyal SCOTUS to rule in his favor (he has already said he expects the election to reach the SCOTUS);
- use the tens of thousands of armed Republican "election monitors" - already hired - to profile and intimidate anyone who looks like a Democratic voter while slowing the lines long enough that people go home or can't get in by the deadline; the GOP used this exact tactic in 1981 in New Jersey and was barred from doing it again until this election, which a GOP strategist was caught saying was a "huge, huge, huge, huge deal";
- have his son's "Trump Army," a far-right militia, engage in further intimidation, and outright violence if the outcome isn't to his liking;
- urge every right-wing militia and terrorist in the country to engage in violence if he loses, or if he needs them to do things like seizing and destroying ballots;
- have huge numbers of mailed ballots tossed on technicalities such as improper amounts of envelopes, hard-to-read signatures, slight differences between official and signed names, anything.
As the article
@Lexicus linked states, the threat isn't that he has to be escorted out; it's that he will do absolutely anything to reduce Democratic turnout, destroy or invalidate their ballots, make it very unclear who won the election, and then provoke violence against his opponents. Each and every one of these things is not the delusion of paranoid Democrats, but plans that the GOP has already hinted at or outright announced.