I think if something happened to his health or his family would be the only reason they Biden would withdraw. I don’t see the current issues around Hunter Biden likely rising to that level. Trump will have to be forced to withdraw and I don’t think he will be found guilty before the election in any of his cases. It’s a long shot but it’s possible they the 14th amendment cases suceeed. It’s also possible but less likely that Republicans actually do grow a spine and Trump is actually defeated either in the primaries or at the convention. Those are all in the realm of possibility but I don’t think are likely.