Never Biden
Most accounts I've read claim that what did Bernie in is the failure of young people--the heaviest Bernie supporting demographic--to turn out and vote. That's a big problem for the Dems. Now Politico is reporting that the problem goes much deeper:
"In Michigan — a state critical to Democrats’ efforts to reclaim their general election footing in the Rust Belt — just 2 of 5 Sanders backers said they would vote Democratic in November, regardless of who became the nominee, according to exit polls. Four in five said they'd be dissatisfied with Biden as the Democratic standard-bearer."