washington u.s. house representatives pass two piece legislation link international nuclear agreement iran thursday one year landmark pact announce defy president barack obama veto threat vote largely along party line republican-controlled house vote 246 179 pass new set sanction iran 246 181 measure block iran access u.s. financial system include use dollar house wednesday pass bill bar u.s. purchase heavy water also little back democrats heavy water non-radioactive byproduct make nuclear weapons nuclear energy obama administration say april unite state would buy 8.6 million worth heavy water iran anger republicans call subsidy country nuclear program measure among last house pass congress leave washington seven-week summer recess word whether measure would take senate every congressional republican several obama fellow democrats oppose nuclear deal iran unite state world power announce july 2015 tehran agree curtail nuclear program exchange relief cripple international sanction since republicans repeatedly offer sanction bill iran-related legislation democrats dismiss bid score political point undermine deal see potential foreign policy legacy obama republicans say want punish iran action include ballistic missile test send strong message tehran abide international commitments u.s. house pass iran sanction financial service measure