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.