I like his Plan B better. A large majority of Democrats across the country are concerned about Biden's age and ability to carry on for another four years. If he were to step side for Harris, suddenly Trump would be the old guy with cognitive issues. Fox and other republicans are already bashing Biden, so any new candidate will just get the same treatment. Biden is a very decent guy and is generally seen as a good president, but after the debate debacle he is now having to defend himself and try to salvage his credibility as a candidate, rather than being able to put all the focus on Trump's faults. The only way he can win now is if enough voters turn out to support the Democrats simply because they want to keep Trump out of the White House. If Joe could manage a smooth transition, it would inject new life into the election, particularly if Harris can get the support of the big donors and Democrat heavyweights, and picked a good VP. If he can't or won't step aside and it turns into a bun fight, I agree they will lose.