I haven't heard any of those rumors, but I also don't get my news & information from traditional sources.

Hell, our three ducks that we have left make as much sense to me with their quackin' as does the folks on the news with their fancy haircuts and clothes. News nowadays is just noise, unpleasant noise at that.

The Democrats can't make a change to late in the game for one reason; mail in voting ballots. It takes time to print and mail the ballots and then allow them to be returned for processing the count. Once the first ballot is mailed out to a voter it is game over on making a change to the ticket.

Even the most ignorant of people have to know that Biden isn't going to be President for more than a week if he were to be declared the winner of the election. He would just hand it off to his VP and go back into his basement.
The VP might change though, that Harris woman has some baggage of her own that will be getting some extensive scrutiny for sure real quickly.

The only thing to do is see how it plays out.
You enjoy the weekend as well,
Sult