welcome back to "state of the union," i'm dana bash. as president trump prepares for the nato summit and a high-stakes one-on-one meeting with vladimir putin, there's overnight news on his other big foreign policy challenge, talks with north korea. republican senator jeff flake is a member of the foreign relations committee, and joins us now. senator, i want to start with north korea. officials there are saying that the u.s. betrayed the spirit of last month's summit between the president and kim jong-un, accused the administration of pushing a gangster-like demand for denuclearization. but mike pompeo, the secretary of state, says that didn't happen. the talks were substantive, and the nations are working together to -- on denuclearization. what do you make of the mixed messages? >> well, my guess is that mike pompeo is demanding what he should demand.