Is it just part of "The Plan"?
Did Biden Say He’d ‘Develop Some Disease’ and Resign If He and Harris Disagreed? (December 9, 2020)
https://www.snopes.com/fact-check/biden-harris-disease-disagreed/
"Regarding what he would do if he disagreed with Vice President-elect Kamala Harris, U.S. President-elect Joe Biden said: “Like I told Barack, if I reach something where there’s a fundamental disagreement we have based on a moral principle, I’ll develop some disease and say I have to resign."
It is not clear what Biden meant when he said he would “develop some disease” and “resign,” but some outlets interpreted this as an attempt at a joke. Harris simply smiled during the remarks."
Even Snopes couldn't spin something Biden said last week into something that made sense.
But what was Kamala smiling about, eh?