I think history is going to tell us whether we're having some effect. It's pretty hard to discern where we're at right now. I think we're in a pre-negotiating phase where both sides are trying to improve their leverage by the time they reach the negotiating table. But I think North Korea is not immune to the fact that those in the international community, including major western powers, are consistently advocating that it abandon its aggressive posture and engage in a diplomatic solution. One day we hope to see the results from that.
On September 14th, 2017. See this statement in context.