"The president remains fit for duty, and fully executes all of his responsibilities without any exemptions or accommodations", O'Connor said on Friday.
O'Connor said Biden has been experiencing increasing frequency and severity of "throat clearing" events while delivering speeches, warranting a detailed investigation. Biden's gait is also stiffer and he has experienced having less fluid than a year ago, which also warranted investigation, O'Connor added.
On Thursday, Biden briefly transferred power to Vice President Kamala Harris while he was under anesthesia during a routine colonoscopy. This was the first time, even if for a brief period, that a woman had been at the helm of the United States.