At this point there's no way to do it legally. Ballots are already being printed. But legality's not an issue for Trump and his personal fan club.
I think Vance could step down, then Trump would have no running mate, I think? And a VP would be appointed by Congress if he wins? Idk.
I read somewhere on Reddit or somewhere way back when about The nasal cycle where one nostril sort of constricting (just due to blood flow and normal sinus congestion) allows for optimal air flow and moisture in our nostrils.
The poster also said that if this regular nasal cycle resulted in being unable to breathe on one side, consistently, you have a deviated septum. I don't know if that's 100% true, but I 100% had a deviated septum.