The Trump administration's approach to North Korean denuclearization negotiations is becoming increasingly simple to digest: Go big or go home.

That was the message U.S. Special Representative for North Korea Stephen Biegun delivered Monday in a speech at the Carnegie International Nuclear Policy Conference.

In a livestreamed keynote address before scores of security experts and scholars, the top U.S. envoy in charge of negotiations with Pyongyang said that Washington will not settle for step-by-step disarmament and insisted that North Korea relinquish not only its nuclear arsenal but all of its weapons of mass destruction.