And you kind of prove the point here that Bernie loses leverage every day. It was at its peak on June 7th, but after Hillary clinched the nomination and got endorsements from Obama/Biden/Warren etc., Trump imploded, and Hillary surged in the polls, many of the Bernie supporters are already beginning to rally around her. As time passes, more and more will gradually do so. Soon the only people who are left will be those that are so deranged with Hillary hatred (like you) that his endorsement would mean nothing to them, and even being on the ticket would mean nothing to them since it would just mean he "sold out." Meaning his endorsement would then be effectively worthless.
This. Merkley, Grijalva, MoveOn, and many others Sanders supporters have already abandoned him and endorsed Hillary.
The only ones left are nutjobs like that Nina Turner character who just today was saying that a Sanders nomination is still possible and if not then there should be a third party run by a "real" progressive.
P.S. BTW, what's wrong with that woman? Bill Clinton campaigned for her in 2014, she was a Hillary supporters initially, but now she has become more unhinged than HA Goodman.