The Dem ticket must have two boxes checked, i.e., a woman and a minority. Warren would fill the first one, which means that a minority would have to be in the VP slot. Harris fills both as does Gabbard. Booker and Castro are minorities and candidates for VP. Or Warren could go outside the Presidential candidates, as is usually the case, to select a running mate. Regardless, a woman and minority or some combination thereof must be on the ticket. There will not be two Non-Hispanic whites on the Dem ticket.
Maybe, Oprah, as her VP choice?
Michelle Obama for VP, if not Oprah.