washington unite state thursday extend sanction relief iran 2015 nuclear deal say yet decide whether preserve deal state department say president donald trump must make decision mid-october could undermine agreement say iran violate spirit 2015 deal iran get sanction relief return curb nuclear program sign trump desire put pressure iran deny violate deal u.s. treasury announce new cyber-related sanction seven iranian individuals two iranian entities two ukraine-based entities go stand trump tell reporters air force one stop short say whether refuse recertify agreement trump must decide october whether certify iran comply agreement know joint comprehensive plan action jcpoa congress 60 days decide whether reimpose sanction waive deal prospect washington renege agreement worry key u.s. ally help negotiate deal especially world grapple another nuclear crisis north korea nuclear ballistic missile development republican senator bob corker chair senate foreign relations committee write law give congress right review iran deal say white house prepare case change policy also say recognize need work ally think important ... take step extent keep ally together corker tell reuters want self-create crisis reason want make sure outcome good outcome unite state interest ask make sense abandon iran nuclear deal give concern north korea corker say think prejudge administration go separately u.s. secretary state rex tillerson argue unite state must consider full threat say iran pose middle east formulate new policy toward tehran say iran breach spirit deal consider totality iran activities let view define solely nuclear agreement tell news conference london cite preface 2015 agreement tillerson say view iran clearly default expectations cite iranian support syrian president bashar al-assad development ballistic missiles cyber activities deal preface oblige iran promote global peace rather say nations involve anticipate full implementation jcpoa positively contribute regional international peace security state department spokeswoman heather nauert tell reporters administration approve waivers sanction iran maintain flexibility develop iran policy specify sanction waive early source say unite state renew waiver punitive sanction iran tuck section 1245 2012 national defense authorization act washington threaten sanction bank iran main oil customers significantly cut purchase iranian crude law sanction waive maximum 120 days force u.s. government revisit issue every four months even administration waive oil-related sanction treasury department announce sanction 11 entities individuals engage support designate iranian actors malicious cyber-enabled activity 11 seven iranian individuals two iranian entities two entities base ukraine treasury allege either support iran ballistic missile program quds force engage cyber attack u.s. financial system action freeze assets may hold unite state generally prohibit u.s. individuals business u.s. extend iran sanction relief nuclear deal