Making Biden leave now makes Harris become their front runner. She’s even more unlikable than Dimentia Joe. This would also cause a mess at the DNC as she would want to run for election as an incumbent. So tactically we may want that, instead of Newsom or Michelle.
This will all come down to the DNC convention where Biden, if not already removed, will be pushed aside and a new candidate selected. Chaos will ensue in all dem black run cities when a black woman is not selected. ANTIFA and BLM will be unleashed since they are the de facto brown shirts of the dem party.
There don’t seem to be many good options left for the Dems. Replacing Biden wouldn’t solve all their problems. Whoever stepped in to take his place would still have Biden’s record as an albatross around their necks. Getting Michelle Obama to run would probably be their smartest move but she doesn’t appear to want it.