Sounds like a far leftist annoyed that Pocahontas is still in the race, thereby getting in the way of Bernie’s coronation as the Democratic nominee. I doubt she’ll get out of the way. It’s also an open question whether she’ll endorse Bernie after crashing out (unless he picks her as VP). I expect Biden will similarly offer her this role as the price of her endorsement. Who she endorses will depend on who she thinks will win against Trump.
Is her endorsement worth that? I don’t think so.