washington u.s. republican presidential candidates take swipe tuesday lift sanction iran disagree would handle tehran win white house nov. election iran expect abrupt shift relations unite state aggressive posture republican president reversal warm trend nurture democratic president barack obama two weeks go first nominate contest presidential race republican candidates devote large section stump speeches iran give tehran much time devote condemnations islamic state militants also know isis would say former florida governor jeb bush tell council foreign relations new york tuesday convergence aggressive iran region isis two threats deal day one confront ambition obama carry 2008 campaign pledge negotiate iran strike agreement last year curb tehran nuclear ambition deal cap weekend unite state along countries lift sanction iran washington swap prisoners islamic republic republican condemnations obama iran policy abound split among candidates far go tehran u.s. senator ted cruz texas u.s. senator marco rubio say would rip nuclear deal start think unite state would able persuade european ally reimpose economic sanction europeans go decide want deal iranian economy american economy say cruz foreign policy adviser victoria coat choice put them rubio adviser say senator florida feel strongly iran get good obama administration rubio would begin discuss good relations tehran will respect human right change stance israel go cancel ridiculous deal rubio say last week mount pleasant s.c. candidates like ohio governor john kasich front-runner donald trump cautious prefer wait see situation iran next president swear jan. 20 2017. kasich tell reuters unite state work u.s. ally ensure iran stick deal rein nuclear program violations sanction quickly reimpose think time go go hard people addict money say know go 10 months one know go be trump say would tough rip agreement iran nuclear program vow elect president would police contract tough chance republican senator john mccain party 2008 presidential nominee tell reuters argument whether stick iran agreement academic believe iran violate nuclear deal think best thing evaluate inauguration day say go election jan. 20 swearing-in evaluate whether adhere make judgment think bad agreement report steve holland edit alistair bell sap sponsor coverage independently produce staff reuters news agency republicans hammer iran deal presidential campaign