I voted for Sanders in the 2016 primary, but at this point I think he would have been destroyed, McGovern-style, if he'd been the nominee either time. He never had to face a truly negative campaign in the primaries and there's no telling how he would have fared if Republicans (and some Democrats!) really twisted the knife with stuff like "the rape essay", his employment history, his association with socialism, etc. We made out so much better with a moderate-seeming guy like Biden who managed to secure most of what Sanders would have been realistically able to pass while giving it a nice centrist sheen.