WASHINGTON (AP) - Republican lawmakers warned the leaders of Iran on Monday that any nuclear deal they reach with President Barack Obama could expire the day he leaves office. The White House denounced the Republicans' latest effort to undercut the international negotiations as a "rush to war."
Monday's open letter from 47 Republican senators marked an unusually public and aggressive attempt to undermine Obama and five world powers as negotiators try to strike an initial deal by the end of March to limit Iran's nuclear programs.
Republicans say a deal would be insufficient and unenforceable, and they have made a series of proposals to undercut or block it - from requiring Senate say-so on any agreement to ordering new penalty sanctions against Iran or even making a pre-emptive declaration of war.
Obama, noting that some in Iran also want no part of any deal, said "I think it's somewhat ironic that some members of Congress want to make common cause with the hardliners in Iran. It's an unusual coalition."
The letter was written by freshman Sen. Tom Cotton, who opposes negotiations with Iran. It's addressed to the "Leaders of the Islamic Republic of Iran" and presents itself as a constitutional primer to the government of an American adversary. Republican Senate Majority Leader Mitch McConnell of Kentucky's signature is on it, as are those of several prospective presidential candidates.
Explaining the difference between a Senate-ratified treaty and a mere agreement between Obama and Iran's Ayatollah Ali Khamenei, the senators warned: "The next president could revoke such an executive agreement with the stroke of a pen, and future Congresses could modify the terms of the agreement at any time."
Iranian Foreign Minister Mohammed Javad Zarif responded via state media, dismissing the letter as a "propaganda ploy" and noting that many international deals are "mere executive agreements." He suggested the senators were undermining not only the prospective deal with Iran but also other international agreements as well.
With Cotton presiding over the Senate on Monday, Democratic leader Harry Reid spoke out, saying Republicans were driven by animosity toward Obama and unwilling to recognize that American voters had twice elected him president.
"Let's be very clear: Republicans are undermining our commander-in-chief while empowering the ayatollahs," Reid said.
The White House denounced Cotton's letter, saying it was part of an ongoing partisan strategy to undermine the president's ability to conduct foreign policy.
Press secretary Josh Earnest said that "the rush to war, or at least the rush to the military option, that many Republicans are advocating is not at all in the best interest of the United States."
Not all Republican senators are united. One significant signature missing from Monday's letter was Bob Corker of Tennessee, the Senate Foreign Relations Committee chairman. Action on any new legislation challenging the administration's strategy would be likely to begin with him.
Still, even if all parties to the international talks reject the letter as a stunt, the mounting opposition to an accord could have repercussions. Negotiating alongside the U.S. are Britain, China, France, Germany and Russia.
The Obama administration believes it has authority to lift most trade, oil and financial sanctions that would be pertinent to the nuclear deal in exchange for an Iranian promise to limit its nuclear programs. For the rest, it needs Congress' approval. And lawmakers could approve new Iran sanctions to complicate matters.
Nuclear negotiations resume next week in Switzerland. Officials say the parties have been speaking about a multi-step agreement that would freeze Iran's uranium enrichment program for at least a decade before gradually lifting restrictions. Sanctions relief would similarly be phased in.
Iran says its program is solely for peaceful energy and medical research purposes. The deadline for the whole agreement is July.
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