I can't speak for Boris as I've had no exposure to him really. Trump on the other hand, I really believe that people give him too much credit with theories like this. I know his type, I've dealt with them all my life. They're not calculating every move they make and the repercussions of them, they simply are dumb and obnoxious. That age group in this country is notorious for being like that. They grew up during times of strong economic growth and could support themselves / a family with ease at some menial job while the wife stayed home, so they never had to challenge themselves or "try" and as a result haven't grown as people. Now for Trump, he was just born rich and made even more money buying property in New York City. And lets be real, any moron could've done that:
He's just an old man with an old mentality, and maybe just losing it at this point for all we know.