Biden is such a shitshow - it's hard to believe they chose him in the first place, and even harder to believe they chose Harris as his running mate.
Nobody wants Biden, even the Democrats. They want Harris even less. Icing on the cake is that even worse than Biden and Harris is Pelosi - who's third in line. They have to do a top-down house cleaning to quite a depth before they find someone sane, and that person would only in place for a partial term.
They insisted on painting themselves into this corner.