"he has focusing and maybe memory issues."

I would not be surprised if both of them have said issues. Their ages are pretty advanced. I just figured the Declaration of Independence thing was him trying not to offend atheists and anti-religious folks.

"a repeat of 2016, everybody vs Bernie"

I'm sure the Democratic establishment and party hierarchy is very much in favor of #Biden and not #Sanders, but I hope they learned from the results of their interference last time. "Blame it on the Russians" only carries one so far before everyone can see that they screwed themselves again.