The narrative begins to change, until they can find something that gives them plausible deniability. Biden’s wife should talk to him, and his advisors, about his obvious senility/dementia, and withdraw. Just imagine, if the Dems impeach Trump on this nonsense, and Biden wins the presidency, he will be impeached, as it is almost a foregone conclusion that the Dems are going to lose control of the house.
If Biden is down by 10 going into the Donkey Convention, he just might "withdraw due to health issues".