The donor class ditches Joe and he refuses to budge. The democrats in Congress privately and publicly confront him and he refuses to budge. The polls collapse around him and he refuses to budge.

I think after all the he will stand down, but suppose he doesn’t? What remaining options?

The only one I can think of is his cabinet and WH staff threatening to resign en masse. Would they ever do that?

We find ourselves in an extrordinary situation.