The norm sucks. The fucking norm got us into this mess by discouraging people from primarying a sitting president. If we'd had a robust primary we'd either be fully on board with Biden or we'd have dropped him already.

Fuck norm. He was like the worst character on Cheers.

sitting congressmembers publicly asking for the presumptive nominee and incumbent president to step down

Not enough hyperbole dude. I don't have time to do the research, but its not clear to me that a situation where the incumbent president and presumptive nominee is being asked to step down by effectively ALL of the rest of party leadership, with only the fringe block (progressives) maintaining support.

I think i can recall a vaguely similar situation with maybe Grover Cleveland and the mugwumps? And iirc that was all about currency (gold vs silver vs fiat vs a historical aside: land based currency; worth reading on)..