More Cryptic Messages from Trump on North Korea.
BOLDUAN: President Trump firing off about North Korea again this morning. Writing on Twitter the following: "Our country has been unsuccessfully dealing with North Korea for 25 years, giving billions of dollars and getting nothing. Policy didn't work." This comes after more cryptic tweets over the weekend where the president said that only one thing will work with Pyongyang. So far, we don't know exactly what that is.</s>UNIDENTIFIED REPORTER: What's the one thing that will work with North Korea?</s>DONALD TRUMP, PRESIDENT OF THE UNITED STATES: You'll figure that out pretty soon.</s>BOLDUAN: The latest version of, "You will see, believe me." Let's bring in CNN's Will Ripley. He's spent quite a lot of time reporting on the ground in North Korea. He's joining me now from Tokyo. It's great to see you, Will. This all -- this was all weekend and continued into this morning. Oh, yes, and it was last weekend as well that the president was firing off about North Korea. How are North Koreans receiving this vague, but consistent threat from the president?</s>WILL RIPLEY, CNN SENIOR INTERNATIONAL CORRESPONDENT: You know, I've been having conversation with the North Koreans, because, remember, they're also hearing from the State Department and the defense secretary that this is a diplomatic push, that the United States is talking with North Korea, that there are channels open. And yet, North Koreans are telling me channels haven't been activated and they see no point to have discussions right now with the Trump administration because you have this bellicose rhetoric coming from the top from the president. Then the secretary of state saying, actually, we want to negotiate. What are they supposed to think? They are saying to me that sitting at the diplomatic table wouldn't result in anything, a deal they could rely on because, even if a deal were negotiated, they're not convinced President Trump would follow through on it. So you have North Koreans frustrated with the mixed messaging, confused, trying to get answers. Certainly, leaders around the region are very nervous that this could lead to an accidental war that would be far more catastrophic to people in this region than elsewhere. And then you have this reshuffle of the North Korean elite. You have Kim Jong-Un promoting his younger sister and foreign minister to these major roles in the top decision-making body. The foreign minister is the one who threatened to detonate a nuclear bomb over the Pacific and also called President Trump president evil. So if you think he's surrounding himself with advisors who are sympathetic to the United States, think again. It's hardliners surrounding Kim Jong-Un right now -- Kate?</s>BOLDUAN: A lot of messages being sent and, just, nuclear war at stake. Will, great to see you. Thank you so much. Coming up for us, the president -- the president's growing war of words with a powerful Senator from his own party. How does this back and forth help the president's agenda? Someone, please explain. That's coming up.