Just listen to how he speaks in just the last year alone. There is something drastically different going on inside his mind. My grandmother passed away in 2008 of a stroke before that happened. She was very lively with a voice that could easily fill a room. Towards the end of her life she would slur words talk in a whisper and go on long rambles about nothing or things that happened years or decade ago. I see the same thing happening with Trump now.