Lowlights From Biden's 'Big Boy' Presser

Vice President Who? Biden Mistakes Kamala for Trump in Another Embarrassing Name Gaffe

'I wouldn't have picked Vice President Trump to be vice president did I think she was not qualified,' octogenarian says

WATCH: Confused Biden Introduces Ukraine's Zelensky as 'President Putin'

Gaffe came shortly before octogenarian leader's highly anticipated press conference

WATCH: Ruben Gallego, Running for Senate in Migrant-Flooded Arizona, Says Border Issues Aren't His 'Expertise'

Gallego's admission comes as polls show the border is a top issue for Arizona voters

WATCH: Karine Jean-Pierre Dodges on Whether Biden's Team Would Wake Him If America Were Nuked

'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"