I think he is both. He never concedes a mistake or apologizes - ever. That's a classic sign of narcissism - he's right and the rest of us are just wrong. His ego obviously knows no bounds - and he makes no apologies for that either, nor does he ever try to humble himself at all. I do not think these qualities to this extreme are desirable or necessary for any true leader - for a politician maybe, but for an actual leader? no.
Sadly, most of what we ever get to choose from are career politicians who are so full of themselves and so bought and paid for and disconnected from their constituency, they make people cringe. I think that, maybe even more than apathy and ignorance, are what keep people from participating and voting.
Thankfully, this election has one good choice and it isn't Trump. I'll just stop there... :)