Trump’s presser the day after the GOP Convention is the reason why I fear somebody this unstable in the White House. Understand that this is a man who has just been named the Republican nominee to become President of the United States. He stands to become the most powerful man in the world. And yet, on the first day of the general election campaign for him, he goes on and on and on about how Ted Cruz hurt his feelings. Excerpt:

His father. I don’t know his father, I met him once. I think he’s a lovely guy. I think he’s a lovely guy. All I did was point out that on the cover of the National Enquirer there was a picture of him and crazy Lee Harvey Oswald having breakfast. Now, Ted never denied that it was his father. Instead he said, “Donald Trump!” — I had nothing to do with it!

This was a magazine that frankly, in many respects, should be very respected. They got OJ, they got Edwards. If that was the New York Times, they would’ve gotten Pulitzer Prizes for their reporting. I’ve always said, “Why didn’t the National Enquirer get the Pulitzer Prize for Edwards, and OJ Simpson, and all of these things?”

But anyway, so they have a picture, an old picture, having breakfast with Lee Harvey Oswald. Now, I’m not saying anything. Here’s how the press takes that story. This had nothing to do with me. Except I might have pointed it out, but it had nothing to do with me, I have no control over anything. I might have pointed it out. But nobody ever denied — did anyone ever deny that it was his father? It’s a little hard to do, because it looks like him.

So here’s the story, they say, “Donald Trump and his conspiracy theories, he went out and said his father was with Lee Harvey Oswald, and he assassinated the president.” What’d I do?

So two things. Those were the two points.

So on those two points, he said about the endorsement — And I just cleared up, I think I’m doing the right thing in doing it but I have to do it. Number one: The Heidi thing you understand now. Number two: I know nothing about his father, I know nothing about Lee Harvey Oswald. But there was a picture on the front page of the National Enquirer which does have credibility, and they’re not going to do pictures like that because they get sued for a lot of money if things are wrong. Okay? A lot of money. And there was a picture, and that’s the only thing I know. So now they use the two things as the reason he won’t support me.

The indiscipline, and therefore the instability that comes with a Trump presidency is scary as hell. Here’s a guy who can’t stop himself from going off on a Lee Harvey Oswald/Ted Cruz rant the day after he has vanquished all this enemies and taken control of the GOP. This is the guy you want in the Situation Room when China forced down a US intelligence plane and holds its crew prisoner, as it did early in George W. Bush’s presidency? Jay Cost speaks for me.