Biden doesn’t need to drop out if Harris and her supporting team can be integrated into Biden’s core group in such a way that she can genuinely be seen as a co-leader ready to step in whenever Biden falters. (With appropriate forethought it should have been possible to withdraw him from the debate as soon as it became apparent that he was “under the weather” with the offer of Harris as a substitute player to be accepted or rejected at Trump’s peril.) She can then credibly continue to tout his intermittent wisdom as something she wants to continue learning from for as long as he lives – with everyone understanding that that might end within the next four years.
Source: Should Biden stay in the 2024 race? His arguments, parsed. – The Washington Post