"President Barack Obama pledged to veto three pieces of legislation because they contain language that would scuttle implementation of the Iran nuclear deal.
A White House news release on Tuesday said the bills passed this month by congressional Republicans, with little resistance from Democrats, contradict the easing of sanctions that the US promised Iran in return for rolling back its nuclear program.
The measures would expand existing sanctions, hinder Iran's international financial transactions and prevent the United States from procuring Iran's heavy water.
The White House said the bills would undermine the ability of the United States to meet its commitments under the Joint Comprehensive Plan of Action, as the nuclear deal is called.
'The President has made it clear that he will veto any legislation that prevents the successful implementation of the JCPOA,' the news release said..."