I disagree with you on Trump's mental state, we probably will not agree. I watched a lot of the apprentice UK and US. I never found Trump to be truly special but I recognise he has certain talents. I have observed him for a long time and I'm middle aged, my memory is good.
I have worked for three deca-billionaires, I've been around them in person off and on and engaged in lots of chit-chat. They are fairly normal men, they impress me but I do see behind the curtain as well.
I went off him personally, stopped watching The Apprentice, due to the way he dealt with the Aberdeen golf club. He was very bad to people IMO, lied, corrupted officials & police and for no good reason. From 2012, before the president stuff came to the fore.
All I can say is, I can see signs of significant degradation that match my own personal life experiences of dementia. I am good with patterns and it is not wishful thinking because
I'm not a US liberal. I really did not like Hillary but for other reasons.
Pence reminds me of something from the "Handmaid's tale" (a bit) so I'm not whooping for him but you don't see dementia in Trump, I do. I'm usually right in my hunches I can say hand on heart, or in Pence terms, God guides me because he made me wealthy.
For everyone's safety and peace of mind, have the surgeon general or whoever is appropriate check him out.