Wow, good question.
At first blush, I would say as long as she heads the ticket, Obama is still the donkey in the room, and Trump still wins. Perhaps a slight improvement in her performance but still a drubbing.
Bernie supporters are largely young, jobless, or near-jobless disaffecteds who traditionally don't turn out anyway. Voting isn't a fulfilling social event for them, and if their man is second banana, they'll choose to stay home with mom and dad and play video games.
Excellent thoughts. Thank you!