I disagree. I believe Trump's cognitive functions are strong despite being more stressed than usual. My opinion does not care about Trump or Biden's political beliefs but rather my experience observing congnitive decline. I see no congitive decline at all in Trump but I do see cognitive decline in Biden. I am basing my observations on how they have both presented in the past and how they present in recent weeks. Stress is also known to accelerate cognitive decline so this is what we may be seeing.