I think the only votes that wont be tamperex with this election are those cast for a third party. Hillary's paid shills are out in number trying to discourage those people from voting third party. One reason why Assange's is holding off until just before the election to release the rest of the Clinton e-mails. Right now it appears, based on an interview he did with Democracy Now, the next batch will implicate her in a Reaganesque plot to supply arms to ISIS. As they haven't been released, I'm just waiting.
As for Bernie campaigning for Hillary? Pay attention. He's just pointing out how the system was rigged against him. In an interview last spring, he set the stage with one of the media shills that asked him if he would support Clinton. He replied that it wouldn't matter: his supporters will not jump at his command. Hillary will have to earn their votes. She's gone out of her way to turn away progressives. Some have fallen for the, "If you don't vote for Hillary, Trump will become president!" BS. If the number of Bernie supporters vote third party, Hillary's campaign will justifiably be Nadered, even if it means we have to say President Trump at this time next year.
After all, cheaters should never prosper.