Transcript for Trump cancels North Korea summit

So the guy in the white house announced this morning that his meeting with Kim Jong-un is canceled. Now in a letter responding to North Korea's threats to pull out where they call vp Mike pence ignorant and stupid, he wrote, based on the tremendous anger and open hostility in your recent statement, I feel it's inappropriate at this time to have this long planned meeting, adding, you talk about your nuclear capabilities, but ours are so massive and powerful that I pray to god it will never have to be used. He actually said all that. Mm-hmm. Well, is it a surprise? There goes that Nobel peace prize. There it goes. We were talking about diplomacy and how important it is, and I think many of us were giving him the benefit of the doubt of perhaps learning diplomacy, but when you then send this letter talking about massive and powerful nuclear capabilities, not only does the Nobel peace prize, which I think 18 house Republicans nominated him for, meeting that hadn't happened yet. With his face on the coins. The commemorative coins, and here goes the theory that this man can be truly diplomatic. There is sometimes a reason why presidents of both parties have not done this exact thing. There was a reason why there was -- I think there was a term Obama used and I forgot what it was called about diplomacy. It's kind of an intentional diplomacy which means they know if they show up and having this meeting, there won't be de-nuclearization, and this is what happens. There are no preconditions. We did get the hostages back and that's a good thing in this conversation. Yeah. I mean, North Korea's prime minister slammed vice president pence calling him a political dummy, and he said, they could end up like Libya, and it started not just from trump, but started with other north Korean officials and vice president pence. What's weird to me about it, I was sort of cautiously optimistic, but seeing the narrative change on Kim Jong-un recently and other realms of the media, may this is a guy we can talk with, and maybe this is a guy that's not so bad. We emphasized he threw his half-brother to be eaten by wild dogs. He is one of the worst dictators of all time, and maybe worse than Putin because he is less easy to negotiate with than Putin. Am I optimistic we can do something with president XI in China shutting down their economy? That's still at play. What deal has he actually closed? The wall has not been closed. He said he is going to drain the swamp. The swamp is filled -- The tax plan, number one. The tax plan was pushed through, and probably is going to have destructive things happen because of it. Well -- He makes deals that don't work. He also legitimatized in my view, Kim Jong-un now. He called him a smart and honorable man, and now he is being considered -- I guess, a relevant world player. That's very damaging. There has to be delegate language because they were pushing these meetings through, and I think he had to walk a line. We should be fearful that there are American journalists in North Korea and South Korea, and if you are putting out a statement like this, talking about if you change your mind, call me. It's a very incendiary letter, and let's not forget what happened to Otto Warmbier. That's my biggest concern. If you change your mind, call me, and I'll, like, Yo, Kim. What's up, dude? Are we hanging? He wanted to break up with Kim before Kim broke up with him. I was very much looking forward to being there with you. Mike Pompeo actually met with Kim Jong-un, so it will be interesting to see if any other trump officials will continue doing this. He seems to be a better diplomat. Well, maybe, but, you know, we'll see.

This transcript has been automatically generated and may not be 100% accurate.