Iran nuclear talks set to resume in spite of unease in both Tehran and Washington

Iranian lawmakers questioning a possible nuclear deal with world powers were seeking Tuesday to block likely concessions offered by Tehran in exchange for easing Western sanctions.

The effort was mostly symbolic on the eve of negotiations in Geneva, but it highlights Iran's deepening internal rifts.

Ambassador Samantha Power on Iran, sanctions: "We have to test this regime"
President Obama, meanwhile, was to meet Tuesday with a bi-partisan group of Senate leaders to try and persuade them that the diplomatic effort was worth giving some breathing space. The White House has mounted a concerted effort on Capitol Hill to prevent any new sanctions against Iran from coming to a vote in Congress before the Geneva talks conclude.

The White House said Obama would meet at the White House Tuesday with the chairmen and top Republicans on the Senate's banking, foreign relations, armed services and intelligence panels.

Mr. Obama, Vice President Joe Biden and Secretary of State John Kerry have all been vocal in the campaign to dissuade Congress from passing a new round of tough sanctions while the delicate talks are underway.

White House spokeswoman Caitlin Hayden said Mr. Obama would update senators on the negotiations before talks between Tehran and world leaders resumed on Wednesday.

In Tehran, it was unclear whether enough signatures could be collected for a vote in Iran’s parliament, the results of which would also need the approval by the ruling clerics.

Iran's Supreme Leader Ayatollah Ali Khamenei has backed the nuclear talks.

Conservative lawmaker Fatemeh Alia was quoted Tuesday by the semiofficial Mehr news agency as saying she and fellow lawmakers wanted an urgent bill to stop the government from offering to suspend uranium enrichment at the highest level acknowledged by Iran and freeze work on a planned heavy water reactor.

Nuclear Iran: Sites and potential targets
Nuclear Iran: Sites and potential targets
While the details of the potential deal have been kept secret, it is widely suspected that Iran might agree to halt enrichment of uranium to the 20 percent level -- from which it can be rapidly converted into weapons-grade material. A stop to construction work on a new heavy water reactor facility in the city of Arak has also been mentioned frequently as a possible concession from Tehran.

Chief White House correspondent Major Garrett told “CBS This Morning” on Tuesday that while the Obama administration is hoping for a break-through this week, Kerry has made it clear his negotiators simply don’t know what to expect from the other side, and Kerry said Monday he had no “specific expectations” as the American diplomats headed for the Geneva talks.

This week’s negotiations are aimed at reaching a first-step agreement with Iran -- designed to serve as a confidence building measure to pave the way for broader talks on the easing of sanctions.

Deal to curb Iranian nuclear program unravels
A previous round of Geneva talks with the same objective ended fruitlessly just a couple weeks ago. Kerry accused the Iranian side of walking away from a deal that all other parties to the talks -- the so-called P5+1, encompassing the U.S., Britain, Russia, China, France and Germany -- had agreed to. Iranian Foreign Minister Mohammad Javad Zarif cast the blame back at Washington, accusing the U.S. of making “conflicting statements.”  

As the second round of Geneva diplomacy approached, Zarif said on Sunday that Iran saw no need for world powers to publicly acknowledge its "right" to uranium enrichment, offering a potential way to sidestep a major sticking point on the nuclear deal.

Zarif's remarks appeared to give more latitude over previous demands that the West declare that Tehran has international clearance to produce nuclear fuel since Iran is a signatory to a U.N. treaty governing atomic technology.

The U.S. and others have balked at supporting Iran's "right" to enrich uranium.