geneva u.s. republican presidential candidate donald trump proposal meet north korean leader kim jong un kind propaganda advertisement election race senior north korean official say monday trump wide-ranging interview reuters new york last week say will talk north korean leader try stop pyongyang nuclear program propose major shift u.s. policy toward isolate nation decision supreme leader whether decide meet think trump idea talk nonsense se pyong north korea ambassador unite nations geneva tell reuters return pyongyang attend first rule party congress 36 years utilization presidential election kind propaganda advertisement say useless gesture presidential election mean sincerity add candidate u.s. president barack obama make unfulfilled campaign promise meet leader democratic people republic korea dprk say north korea conduct fourth nuclear test january launch long-range rocket february trigger tough international sanction adoption hardline position south korean president park geun-hye also north korea ambassador u.n.-backed conference disarmament reiterate country prepare return stall six-party talk nuclear program china russia back idea unite state ally south korea japan reject say responsible nuclear state ... never use first say unite state use nuclear weapons first use also one unite state give hostile policies change attitude also relations normal country say south korea propose high-level military talk south korea refuse now south korea dismiss monday north korean proposal military talk bogus peace offensive say formally reject overture lack plan end north nuclear program say north korea would share nuclear technology countries responsible nuclear state keep observe obligations non-proliferation nuclear technology north korean envoy reject trump overture meet leader