washington u.s. president donald trump hold possibility sunday use trade lever secure chinese cooperation north korea suggest washington might deal pyongyang nuclear missile program need comment interview publish sunday financial time appear design pressure chinese president xi jinping ahead visit trump mar-a-lago resort florida week china great influence north korea china either decide help us north korea good china good anyone trump quote say accord edit transcript publish newspaper ask incentive unite state offer china trump reply trade incentive trade ask would consider grand bargain china pressure pyongyang return guarantee unite state would late remove troop korean peninsula newspaper quote trump say well china go solve north korea tell you clear whether trump comment move china take step increase economic pressure pyongyang long unwilling anything may destabilize north send millions refugees across border also unclear unite state might deflect north korea expansion nuclear capabilities development missiles ever-longer range capacity deliver atomic warheads trump national security aid complete review u.s. options try curb north korea nuclear missile program include economic military measure lean toward sanction increase pressure beijing rein reclusive neighbor u.s. official say although option pre-emptive military strike north korea table review prioritize less-risky step de-emphasize direct military action official add say immediately know national security council recommendations make way trump white house decline comment recommendations trump xi also expect discuss chinese ambition south china sea trillion ship-borne trade pass every year meet thursday friday china claim resource-rich south china sea brunei malaysia philippines taiwan vietnam also claim strategic waterway secretary state rex tillerson speak sunday china top diplomat state councilor yang jiechi xi visit issue bilateral regional importance state department official say condition anonymity china foreign ministry say statement monday call yang describe meet xi trump great significance peace stability prosperity asia-pacific region world large tillerson tell yang unite state would utmost ensure meet positive result ministry say trump deputy national security adviser k.t mcfarland say real possibility north korea could capable hit unite state nuclear-armed missile end trump four-year term financial time report mcfarland estimate appear pessimistic many experts typical estimate take five years say siegfried hecker former director los alamos national laboratory unite state lead expert north korea nuclear program estimate notoriously hard make scarcity intelligence north korea uncertainty high success rate pyongyang might want missiles john schilling contributor 38 north north korea monitor project say pyongyang might missiles capable limit strike u.s. mainland end trump term likely bite late that doubt missile could put service end 2020 reliable perhaps one two successes six launch u.s. would political game-changer say least schilling say trump press china north korea ahead xi talk