A Trump/Biden contest could lead to a repeat of January 6

There has to be a strong possibility that if Trump and Biden battle it out for the White House next year, the end result will be so close that we could get another January 6 2021 violent incident. Let's say Biden is declared the winner by a tiny margin. Would this be acceptable to Trump and his followers? Would they dispute it and claim fraud all over again? Let us hope that governors and the National Guard and the White House are even now thinking about and planning for the worst scenario for November next year. Polling seems to be suggesting a close-run battle between Trump and Biden and if the former president follows the same path he did in 2020 he will never accept an election result unless it favours him. So, the only way of avoiding a repeat of January 2021 is for Biden to win an overwhelming mandate when even Trump cannot argue he is the victim of an injustice. But this is unlikely to happen, judging by the current polls. And what if the result is announced in Biden's favour, with Trump waiting to be declared the winner from a prison cell? The potential for violence hardly bears thinking about. I'm sure I can't be the only person fearing the worst.