@cicerone imposter,
You've just brought up a memory that has given me a bit more insight into Trump, ci.
I don't see those claims from Trump to be so much evidence of his narcissism but rather a window into the con man's mind.
I was at a party about twenty years ago in Vancouver with a bunch of Howe Street dudes (Vancouver's version of Wall Street). Walking past a sofa where two were sitting, I overheard just a bit of a conversation. One of the two said, "I did this deal today and it was soooo sleazy". He was laughing. And he was bragging. He was proud of the con he'd pulled on some poor sucker.
Trump knows what he is saying is bullshit. But he is really, sincerely proud of being able to pull of such a transparent con over others. He gets joy from this. He gets a sense of superiority from this. University professors and brain surgeons and rocket scientists can't do what he does - and he makes a shitload of money doing it. He's got them all beat. He's "smarter" than they are. Smarter than the media people who write about him (while making peanuts). He's smarter than everybody. Just look at the chick on his arm. Look at his big building with his name on them.
I hadn't thought of this before but I think it really gets to a foundational part of the man's mind.