I don't make any claims to having the credentials of Dr Silverstone.

I also don't believe that Mr Trump would fit a "classic" diagnosis of madness such that it would render him unfit for office.

Still, it seems to me that all of us suffer from at least a small degree of mental illness.  We may have an unreasonable fear, anger too easily, or be prone to depression.  In the case of Mr Trump, I think the analyses that I have seen painting him as having a narcissistic personality are factual.  He refuses to admit when he is wrong, has had a succession of trophy wives, and is a petulant bully.  He seems to have trouble distinguishing fact from fiction if that fiction furthers his own agenda.

It's not enough to render him unfit for office from a medical perspective.  It just makes him poor presidential material.  A leader should be able to see both sides of an issue and have enough diplomacy to discuss issues intelligently with those who counter his views.  This does not sum up Mr Trump.