Trouble is, his last minute “replacement” would probably be Pence — who, despite all of his supposed moral convictions still hasn’t dumped the Trump. That guy would not make a good president either.
At this point, republicans know that they’ve lost the presidential race — it’s all about the down-ticket votes. Losing the presidency would just result in 4/8 more years of an Obama-like presidency — but losing the house and senate races too would be a major disaster for Republicanism.
Keeping the party together is not going to be easy for them. Their foolishness has resulted in the one thing they had to avoid at all costs.