Lurking Bernie voter here to answer:
The answer from me and my friends is no. Some will vote Trump, some will vote third party, and some won't vote at all. And I'm in California. The re-election of Donald is all but guaranteed. Can you imagine if, during the Republican Primary of 2016, on the day before Super Tuesday, every candidate dropped out at once and endorsed Jeb? Disgusting! Say what you will about the Republicans, but at least they respected the will of their voters. Biden is a dementia patient and will be crushed.
Bernie's biggest mistake in 2020 was pandering to Warren idpol freaks and hardcore commies that pushed him way Left of his message in 2016. The DNC, like they always do, cheated Bernie with the Super Tuesday dirty trick, and now they will pay the price in November. Obviously, I'm very sad tonight, but I take comfort in knowing that the dirty Clinton/Obama legacy is about to be wiped out forever.
The Squad fucking sucks. The DSA sucks. The DNC sucks. Joe Biden can't finish a sentence and Obama and Pelosi used every dirty trick in their playbook to make sure tonight happened. If you want to redpill people, be extremely nice to Bernie supporters and acknowledge they were cheated while the Biden campaign dances on his grave, just like you did in 2016. You'll get even more of us this time. If/when Bernie endorses Biden, point out that he capitulated and that the Democrats will never, ever listen to the will of the people.