This is all a planned ploy by the DNC to get a woman as POTUS. They know the political and social climate in the USA is still such that a woman probably cannot win a traditional presidential election. So the next best thing is to get a women elected as VP with a President who is at an advanced age, has a history of medical problems, and questions about this mental acuity. It would not be surprising to see Mr. Biden, if he is elected, to retire within his first 4-6 months citing "stress and his age". The leaves the door open for Ms. Harris to be sworn in as this nations's first female POTUS. And a progressive, "law and order" type at that.