Really, he would need to drop out or die. I don’t foresee either of those things likely happening. The best hope we have at this point is the election is 5 months away and there is the Convention and (maybe) another debate. The Biden campaign no longer has the luxury of wrapping Joe in bubble wrap while claiming that he is still sharp and up for the task. Instead of trying to convince the country that Trump is a threat to democracy and that Biden can continue to make the economy work for your average American, he will now have to spend a lot more time convincing people he shouldn’t be in an assisted living facility.