Transcript for Trump summit with North Korea in jeopardy

We go to the white house now. New questions about that nuclear summit between president trump and north Korean leader Kim Jong-un. The president says there is a chance it won't take place on June 12th as foreign journalists head to North Korea to witness the destruction of the nuclear test site by the north Koreans. Cecilia Vega tracking all the latest. Reporter: Good morning. That is the big question here this morning, will it or will it not happen? The president says his meeting with Kim Jong-un might not happen. One thing is clear, its future hangs in the balance. In the oval office with south Korea's president by his side he cast a shadow over his summit with Kim Jong-un saying it could be delayed or altogether canceled. There's a very substantial chance it won't work out and that's okay. That doesn't mean it won't work out over a period of time. But it may not work out for June 12th. Reporter: With North Korea threatening to back out, the president also raised the possibility of backing down from a key U.S. Demand complete and immediate denuclearization. It would certainly be better if it were all in one. Does it have to be? I don't want to totally commit myself but all in one would be a lot better. What went wrong? President trump blames Kim's recent trip to China saying the north Korean leader changed his tune after meeting with the Chinese president. I think there was a little change in attitude from Kim Jong-un, so I don't like that I don't like that. Reporter: The president's secretary of state Mike Pompeo who has twice met with Kim now says he's not willing to bet on the future of a summit. I'm not a betting man. So, I wouldn't care to predict whether it will happen. Only to predict that we'll be ready in the event that it does. Reporter: While president trump continues to offer a dictator like Kim assurances like protection and safety. We will guarantee his safety. He will be safe. He will be happy. His country will be rich. Okay, here's where things stand at this hour. South Korean officials say there is a 99.9% chance that this summit will take place but I am told less than two weeks ago a north Korean delegation failed to show up for a planning meeting with U.S. Officials. That gave the white house cause for concern. A U.S. Delegation is still actively making preparations, George. I'm told this weekend they will be heading to Singapore. They are planning to head to Singapore where the meeting is taking place but at this point it is anyone's guess. We'll see if the north Koreans show up for that. Meantime, on another front on a legal front a new move that could have consequences for president trump. His former lawyer, Michael Cohen's business partner, a man named evgeny Freidman has now said he's going to cooperate with prosecutors in a case here in New York. That could put more pressure on Mr. Cohen and eventually president trump. Reporter: Exactly. Freidman cut a deal and will serve no jail time in exchange for cooperating with state and federal investigators. That includes those prosecutors in New York involved in the Cohen case. This is a close business associate of Michael Cohen. Cohen as we know is already under a ton of pressure after that raid on his home and his offices. You know this, George, president trump had boasted that Cohen wasn't the type of guy who would flip. We will see now. More pressure coming. Okay, Cecilia, thanks very much.

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