'Could Have Diagnosed Him From Across the Mall': Democratic Neurosurgeon Tells NBC Biden Clearly has Parkinson's

WATCH: Babbling Biden Lashes Out at Critics During MSNBC Phone Interview

WATCH: Joe Biden's Senior Moment of the Week (Vol. 101)

'You got to know how to know'

WATCH: Joe Biden Recites His ABCs (Vol. 3)

'Say hello to oyster bunnies!'

WATCH: Watergate Reporter Says Biden Had 15-20 ‘Horror Show’ Episodes in Past Year

Carl Bernstein said Biden's dismal debate performance was not a "one-off"

WATCH: Joe Biden's Senior Moment of the Week (Special Debate Edition)

'We finally beat Medicare'

CNN's Van Jones Eulogizes Joe Biden

BEASTMODE: Trump Boasts of Killing 'Two Greatest Terrorists Anywhere in the World'

WATCH: Biden Malfunctions, Claims He 'Beat Medicare'

The octogenarian president appeared to lose his train of thought during his answer

Biden Says No American Troops Died on His Watch, Ignoring 13 Deaths During Botched Afghanistan Withdrawal

Biden ignores Americans' deaths on his watch