I certainly see the provisions of the 25th Amendment being invoked.
Acting President “Que mala” Harris would be a disaster walking, but it that better or worse than the present situation? We already have “disaster walking (or shuffling, as the case may be)”.
If the Democrats could persuade the Wise Latina to retire (she will be 70 next year), they could twist Kamala’s arm enough to get her to take a seat on the Supreme Court and resign the Vice Presidency (she’s be the third VP to do so) and then the ‘Rats could substitute someone they consider electable for 2024 and have Biden retire.