Democrats and Republicans backing a bill to give Congress a chance to review a nuclear deal with Iran insisted on Tuesday that it be passed free of controversial add-ons that they claim could scuttle negotiations with Tehran, draw a presidential veto or leave lawmakers with no say on a national security threat. As written, the legislation would block President Barack Obama from waiving congressional sanctions for at least 30 days while lawmakers weigh in on any final deal the U.S. and five other nations can reach with Iran. And it would stipulate that if senators disapprove the deal, Obama would lose authority to waive certain economic penalties – an event that would certainly prompt a presidential veto. Senate Minority Leader Harry Reid warned GOP presidential hopefuls in the Senate not to use it as a “platform for […]