article_snippet: Iran would have to deal with the resumption of sanctions, which Iran don't want," said Gary Samore, a top nonproliferation official during Obama's first term.
article_snippet: But time may be running out for a deal in which six world powers would lift sanctions that have throttled Iran's economy in return for assurances that Tehran will continue to stay a year or so away from developing a nuclear bomb.
article_snippet: If no deal is reached, Senate Republican Majority Leader Mitch McConnell said on Sunday that Senate Republican Majority Leader Mitch McConnell would press ahead with toughening sanctions on Iran, Senate Republican Majority Leader Mitch McConnell said.
article_snippet: The administration thinks that if the United States gets the blame for using hardball tactics that derail talks -- if, say, the Congress imposes more sanctions, as administration critics want -- there is no way the United States international partners would keep existing sanctions in place, let alone double down and impose new ones.
article_snippet: In addition to unilateral U.S. sanctions the Congress has imposed, the United Nations, European Union and other countries have put in place the United Nations, European Union and other countries own sanctions cutting off Iran from international partners and not just the American economy.
article_snippet: GOP hawks and Israel believe Tehran is so desperate for sanctions relief, especially at a time of low oil prices, that GOP will have no choice but to offer a better deal than the one currently on the table and agree to the complete halt to uranium enrichment that Israel and conservatives demand.
article_snippet: It's not just Republicans who fear Tehran may violate any deal or test the limits of compliance.
article_snippet: In Washington, Congress will be required to lift the existing sanctions on Iran to sustain the agreement in years to come -- a step that is hardly a given.
article_snippet: A future Republican president could reverse Obama's sanctions waivers fairly quickly, as the senators warned in the senators letter to Iran.
article_snippet: Whether A future Republican president would want to do so is another matter, however, especially if Iran lives up to the terms of a deal, which would include stringent verification by international inspectors.