The exit polls in every state still support M4A. The older voters aren't voting on policy, they are overwhelmingly voting on "electability". They don't care, they want Trump gone and MSM has told them that Joe is their man. We'll see how electable he is after the debate. We'll also see the MSM spin afterwards.

The voters that are turning out probably haven't heard Joe speak in years and just watch old media.

If Bernie wants to grab their attention, he needs to focus on electability. Forget the "grass roots", "revolutionary" stuff, he already has their vote. He has to hammer home that he's the guy that can beat Trump and that Joe has no chance of doing the same.

That or rely on old folks being to afraid to go to the polls because of COVID-19 /s