I mentioned it in another post, but people keep saying that he'll hire good people and listen to them .... if he hasn't done that yet (to get a handle on all of these gaffes) what makes anybody think he will in the future.
As far as his speeches go, I'd expect better from a HS student running for class president. They are monosyllabic, disjointed, rambling .... you'd think he'd hire a speech writer or something. But in order to do that, he'd have to recognize he has a problem, and I don't think he has the capacity to do that, which goes back to my former point. What makes people think he will ever listen to anybody else when he thinks he's the greatest at everything already and is never wrong?