unite nations unite state say wednesday weigh whether iranian nuclear deal serve security interest even iran say expect washington abandon agreement collapse 2015 deal u.s. president donald trump call embarrassment support major power negotiate iran could trigger regional arm race worsen middle east tensions iranian president hassan rouhani vow country would first violate agreement tehran agree restrict nuclear program return loosen economic sanction cripple economy think trump walk deal despite rhetoric propaganda rouhani tell reporters sideline u.n. general assembly gather world leaders also rule idea renegotiate pact trump tell reporters make decision agreement would say decide matter clear iran world power negotiate deal britain china france germany russia unite state meet talk european source say include long discussion u.s. iranian foreign minister first time two men u.s. secretary state rex tillerson iranian foreign minister mohammad javad zarif meet since trump take office jan. 20. eu foreign policy chief federica mogherini say side believe violations deal unable say roughly hour 20-minute meet whether unite state would stick already one potential nuclear crisis definitely need go second one tell reporters allude north korea pursuit atomic weapons ask unite state commit stay pact appear loss say another question tillerson tell reporters trump wish leave iran nuclear issue next president reason carefully consider decision whether find jcpoa continue serve security interest american people say refer pact formally call joint comprehensive plan action u.s. president tuesday call deal one bad one-sided transactions unite state ever enter tell reporters make mind whether keep pact decline disclose decision trump must decide oct. 15 whether certify iran comply pact decision could sink deal u.s. congress 60 days decide whether reimpose sanction waive accord senior u.s. official say trump lean toward certify iran comply pact let congress effectively decide whether kill agreement official say trump could always change mind deadline note publicly privately fume deal feel unite state take advantage source familiar u.s. discussions say trump administration also consider ways leave agreement intact sanction iran missile test support extremist group seek strengthen pact prospect washington renege agreement worry u.s. partner help negotiate especially world grapple north korea nuclear ballistic missile development french president emmanuel macron tell reporters would mistake pull pact however also appear open door tough action iran say deal insufficient give iran grow regional influence since 2015. agreement enough give evolution regional situation increase pressure iran exert region give ... increase activity iran ballistic level since accord say chinese foreign minister wang yi say recent tension korean peninsula underline importance iranian deal china would continue support safeguard chinese state media say official gulf nation suggest country could accept deal collapse trump either certify iranian compliance withdraw deal entirely gulf official say think live u.s. weigh whether stay iran nuclear deal