Having cared for a family member for 5+ years with dementia and having a Psych degree under an excellent Clinical Psychologist, I’d say he yes, he’s mentally compromised.
Now, is it dementia or Parkinson’s or another neurological disease we don’t know. But the results are an individual with compromised speech at the least, mental compromise to some degree as well.
If it’s Parkinson’s, my sister in laws sweet Dad had it and his mental and physical abilities were very compromised.
It’s heart breaking, but a nation like the US requires a strong, clear thinking leader with quick accurate judgement.
Joe Biden just misses that mark.