John Campbell does not refer to Biden, but his descriptions of symptoms of Lewy Body Dementia sounds a lot like the form Biden may have. says it’s often diagnosed as Parkinsons, etc:
Rumble: 18mins: Dr. John Campbell: Dementia Awareness
https://rumble.com/v54jmvi-dr.-john-campbell-dementia-awareness.html
He could have both “Mixed” Dementia