Was watching the following video, the poll numbers they reference can be found
here, and the
236% Yes, 40% No, 24%
Unsure in reference to replacing Biden as nominee can be gathered by averaging all Democrat responses on page 55. Not that surprising, people under 45 are the most opposed to Biden, with older people more in favor of Biden, though it was kind of interesting to see that under 45 was about even on replacing vs keeping Biden, with keeping Biden still being the majority view. All that said, if Biden wants to shore up his numbers, he needs to start giving the younger people reasons to vote for him beyond vote shaming tactics: some meaningful administrative positions would help, as would some EO promises.
Edit: And now I realize I got the %s mixed up, so trying to figure out where that 36% came from. Looks like they averaged the Democrat and Republican polled people planning to vote for Biden and Trump, respectively. Kinda surprised that many Republican-leaning people are hoping for Biden to get replaced. Would have been interesting if they polled them further on who they'd like Biden replaced by.