I’ve known both.
I realised my daughter was psychopathic after several concerning episodes that culminated when she ran over a dog and didn’t stop. She wasn’t in the least concerned that it was someone’s pet, she said ‘fucking dog shouldn’t have been on the road’ — this was on a winding road with an urban speed limit in a very picturesque suburban / semi rural area with quite a few houses.
I had a breakdown after a tempestuous four year relationship with a prominent politician / feminist who unfortunately had “the worst case of NPD”- as I was told the hospital psychiatrist had said (pity I didn’t take it seriously enough at the time). For those fortunate enough to never have encountered it, NPD = narcissistic personality disorder.
So, I think I am qualified to comment on both personality traits, and IMHO, Trump clearly has both. As Helen Keller’s sister said ‘he reminds me of Hitler’.
I think this a most lucid, enlightened and educational story, and it should have the widest possible distribution.