History shows that if Biden steps down, it would hand the election to Trump. The last time a party's Presidential nominee stepped down, or was removed (1800's - going off memory, was around 1862, but I could be way off) this late into the election, it caused the party to lose the elections. Back then there was no interent, no social media for the apposing party to capalize on such display of disfuctinality of a party and it's canidate. You think the damage is bad now from Biden's poor performance in the debate. Him stepping down would be catastrophic. Specially 4.5 months before the elections. that's not even taking into account the problems it would cause across the nation. Utah already tried to remove Biden from the Ballot.. if he stepped down, you would see many red states try to keep Biden's replacement off the Ballot. That's not taking into account that nobody else appeared to be able to beat Trump according to the polls taken months ago.