She will cost the election
Trump will lose to anybody. Nominate a horse against him, and it will win.
But Biden is old, and Harris is a sneaky president nobody wants.
She would win if she openly ran alone. A horse would win with Trump.
But running behind Biden, pretending that she is not, when chances are she will be president in the next 4 years is sneaky, dishonest and against what the majority of Americans want.
Her presence on the ticket is what prevents people from voting for Biden, she will be his Sarah Palin.
Replace her now!