Joe Biden withdrew. He voluntarily withdrew from contention. I know you are not especially bright, but even you should realize that Joe Biden decided not to continue in this endeavor.
He withdrew. Now the party could have said...well, I guess we have to concede the election to that asshole Trump because Joe withdrew...
...OR IT COULD APPOINT SOMEONE ELSE TO TAKE JOE BIDEN'S PLACE ON THE TICKET.
I think they did the right thing not to concede...and instead put Kamala Harris forward as the standard bearer.
I figure that despite your severe mental handicap, you realize this is so, but you guys have so little to go on, I guess grasping at straws makes some sense.
Grasp away. Don't mind the laughter from us.
By the way...you folk seem to think she is a push-over. I'm wondering why you are so upset that she heads the ticket rather than being ecstatic.