Oh it will stick all right. Everyone will remember Biden was stabbed in the back by his fellow democrats with Obama leading the attack.

He wasn't stabbed in the back. Biden sh@t the bed. Live, on national TV, for everyone to see. Part of the job description of being a major-party nominee is that you can't ever fork up that badly. But he did.

So he lost that job. It's not being "stabbed in the back" for you to lose a job when you either screw it up or demonstrate you're no longer capable of doing it. Any more than you're "stabbing Grandpa in the back" when you finally have the conversation about taking away their car keys, or that they can no longer live independently. It's definitely something that hurts them, that they don't want to be true....but it's not a betrayal to do that.

This is unlikely to stick because the GOP did such a good job telling everyone that Biden was no longer competent. After spending months and months arguing that he was no longer competent, you can't really argue that the Democrats "stabbed him in the back" when they decided not to let him be the nominee. If he was no longer competent to be the nominee, it's not a betrayal to not let him be the nominee.