"No he is not"? That's all you've got?
Let's look at the evidence. He is on film, in his first speech after his inauguration, saying -
"I was explaining about the numbers. We did a thing yesterday, the speech - did everybody like the speech? You had to like it, so I've been given good reviews - but, but we had a massive field of people, you saw them. Packed. I get up this morning, I turn on one of the networks, and they show an empty field. I said "wait a minute". I made a speech. I looked out. The field was - it looked like a million, a million and a half people. They showed a field where there were practically nobody standing there. And they said "Donald Trump did not draw well". I said "It was almost raining. The rain should have scared them away but God looked down and he said "we're not going to let it rain on your speech."" Fact is. When I first started, "oh no", the first line, I got hit by a couple of drops, and I said "oh, this is too bad but we'll go right through it". But the truth is that it stopped immediately, it was amazing, and then it became really sunny and then I walked off and it poured right after I left. It poured but, you know, we have something that's amazing because we had, it looked, honestly, like a million and a half people, whatever it was, it was, but it went all the way back to the Washington Monument. And I turn on the thing and by mistake I get this network and it showed an empty field. And it said we drew 250,000 people. Now that's not bad. But it's a lie. We had 250,000 people literally around you know in the little bowl that we constructed, that was 250,000 people. The rest of the you know 20 block area all the way back to the Washington Monument was packed. So we caught them, and we caught them in a beauty, and I think they're going to pay a big price."
Those are the words of a man who is so narciscistic that the preservation of his own ego is more important than the truth, and more important than his role as President of the United States.