OK. I was off by a couple of years (I was thinking 79).

I have greater misgivings about Trump. Not just because he's an idiot, and a probable-sociopath. I've heard him speak, and he -on several occasions- has uttered unintelligible gibberish. "Covfefe" was probably the most famous example (it was in the news for weeks), but since then it has not been an uncommon thing. Plus comments about airports in colonial times (or was it the Civil War?), etc. His faculties are not all there. I would expect a general poll NOT to reflect that because about 40% of the country are Reps, and almost none of them have any concern about Trump. That's almost half right there, before you even get to the independents and others. Meanwhile, most of the Reps will say Biden is too old, and some independents and Dems, too. So, no...not a surprise.