Trump says North Korea meeting will happen on June 12

U.S President Donald Trump says the scheduled June 12 summit with North Korea in Singapore will go ahead.

The president spoke outside the White House after a top aide to Kim Jong-un met with him in the Oval Office on Friday to deliver a letter from the North Korean leader, as the two sides try to revive an on-again, off-again nuclear summit.

The president spoke to reporters after the meeting, saying that "I think it'll be a process."

"I never said it goes in one meeting; I think it's going to be a process. But the relationships are building and that's a very positive thing."

"They want it, we think it's important, and I think we would be making a big mistake if we didn't have it," Trump said.

U.S President Donald Trump says the scheduled June 12 summit with North Korea in Singapore will go ahead.

The president spoke outside the White House after a top aide to Kim Jong-un met with him in the Oval Office on Friday to deliver a letter from the North Korean leader, as the two sides try to revive an on-again, off-again nuclear summit.

The president spoke to reporters after the meeting, saying that "I think it'll be a process."

"I never said it goes in one meeting; I think it's going to be a process. But the relationships are building and that's a very positive thing."

"They want it, we think it's important, and I think we would be making a big mistake if we didn't have it," Trump said.

Pompeo, the former CIA chief who has travelled to North Korea and met with Kim Jong-un twice in the past two months, said he believed the country's leaders are "contemplating a path forward where they can make a strategic shift, one that their country has not been prepared to make before."

He tweeted from New York: "Good progress today during our meetings" with Kim and his team. Yet he also said at his news conference that difficult work remains including hurdles that may appear to be insurmountable as negotiations progress on the U.S. demand for North Korea's complete, verifiable and irreversible denuclearization.

"We will push forward to test the proposition that we can achieve that outcome," he said.