No reasonable American is voting for a man with dementia
The polls (which have been consistent now for a couple of weeks) are not an endorsement of Biden as much as a repudiation of Trump. If the current choice before them is deemed unacceptable or untenable, then an alternative, even with dementia, is something people will settle for.
I agree, but take a look at the dem street mobs, or even the so-called "soccer moms" - they are are not even in the same universe as "reasonable".