"I do have a good relationship with Kim Jong-un, as you know, you've seen. He didn't like Biden. He didn't like Obama. He didn't like anybody, but he likes me. And I like, you know, I just got along with him very good. We had great meetings. We speak. And I think our nation and I think other nations, frankly, whether it's Japan or South Korea, they're a lot safer if I'm president than if somebody else is president," he said.

Trump also discussed South Korea after scaling back military exercises with the country.

"I was not happy when South Korea said, no, they're not interested in helping us with the Hormuz Strait," Trump continued. "And yet they get 60 percent of the oil from the Hormuz Strait. I said, would you like to help us? He said, 'No, thank you'. I said, 'That's nice. Please, thank you'. He made us a lot of money. I didn't like that. So I felt that to do a massive, we were doing a massive war exercise. I thought that was very insulting to somebody that, frankly, has been, during my term at least, very well behaved."

Trump said on Sunday that he would reduce military exercises with South Korea shortly before the latest drills were due to begin.

His decision followed a dispute over South Korea and other US allies not helping with Iran as much as Trump expected.