washington u.s. president donald trump strike blow 2015 iran nuclear agreement friday defiance world power choose certify tehran comply deal warn might ultimately terminate trump announce major shift u.s. policy speech detail aggressive approach iran nuclear ballistic missile program support extremist group middle east accuse iran live spirit nuclear agreement say goal ensure tehran never obtain nuclear weapon effect throw fate deal congress single iran islamic revolutionary guard corps sanction deliver blister critique tehran accuse destabilize action syria yemen iraq continue path whose predictable conclusion violence terror real threat iran nuclear breakout trump say trump hardline remark draw praise israel iran arch-foe criticize european ally move trump part america first approach international agreements lead withdraw unite state paris climate accord trans-pacific partnership trade talk renegotiate north american free trade agreement canada mexico iran strategy anger tehran put washington odds signatories accord britain france germany russia china european union benefit economically renew trade iran respond trump iranian president hassan rouhani say friday television tehran commit deal accuse trump make baseless accusations iranian nation never bow foreign pressure say iran deal strong ever european ally warn split unite state nuclear agreement say put limbo trump do undermine u.s. credibility abroad especially international inspectors say iran compliance accord chief u.n. atomic watchdog reiterate iran world robust nuclear verification regime nuclear-related commitments undertake iran jcpoa implement yukiya amano director general international atomic energy agency say refer deal formal name u.s. democrats express skepticism trump decision senator ben cardin say moment unite state ally face nuclear crisis north korea president manufacture new crisis isolate us ally partner trump pull unite state agreement give u.s. congress 60 days decide whether reimpose economic sanction tehran lift pact congress reimpose sanction unite state would effect violation term nuclear deal would likely fall apart lawmakers nothing deal remain place senate foreign relations committee chairman bob corker work amend iran nuclear agreement review act law include trigger point cross iran would automatically reimpose u.s. sanction trigger point would address strengthen nuclear inspections iran ballistic missile program eliminate deal sunset clauses restrictions iran nuclear program expire time trump direct u.s. intelligence agencies probe whether iran might work north korea weapons program president take office january reluctantly certify agreement twice repeatedly blast bad deal ever negotiate predecessor former president barack obama trump warn able reach solution work congress ally agreement terminate see happen next short period time instantaneously tell reporters ask choose scrap deal trump administration designate entire islamic revolutionary guard corps executive order target terrorists administration stop short label group foreign terrorist organization list maintain state department revolutionary guard single dominant player iran security political economic systems wield enormous influence iran domestic foreign policies already previously sanction unite state authorities immediate impact friday measure likely symbolic u.s. military say friday identify new areas could work ally put pressure iran support trump new strategy review position u.s. force u.s. defense secretary jim mattis say change force posture make yet iran respond trump announcement provocative act far trump strike blow iran nuclear deal major u.s. policy shift