that won't happen by serving president xi chocolate cake at mar-a-lago. under pressure north korea could collapse and the newly unified korea would resemble south korea. with a defense treaty with washington will have to promise beijing now that in the event of unification, it would withdraw its troops, change the nature of its treaty relationship with the new korea and working with china, eliminate korea's nuclear arsenal. but pressure will only work if there's some reason for north korea to make concessions. pyongyang has indicated in the past that it seeks a formal end to the korean war. remember, washington signed only an armistice in 1953. north korea also wants a recognition of the regime and lifting of sanctions. obviously none of this should be offered right now, but there is