Alternate links: Google News | Twitter
Biden has faced questions about his age and mental fitness throughout his presidency, but they increased especially in recent months following a rough presidential debate performance against President-elect Trump.
The questions and fears about Biden's age and mental fitness ultimately led to him being replaced at the top of the Democratic ticket by Vice President Harris. She lost to Trump about three-and-a-half months later.
Jamal Simmons, a former aide to Harris, also recently called for Biden to resign so the vice president could have take the role for a short time.