"The jury is still out as to whether we will in fact, be able to achieve a mutual return to compliance with the [Joint Comprehensive Plan of Action] JCPOA," State Department press secretary Ned Price said. "An agreement of this sort is neither imminent nor is it certain."
Price said that while the chief goal is to reach an agreement with Iran to block it from possessing a nuclear weapon, the White House has a contingency plan should the U.S. and JCPOA partner nations fail to broker a deal.
Officials said earlier this month they believed they were in the final hours of reaching a deal before Russia stalled talks to bargain for sanction relief relating to its illegal invasion of Ukraine.
Moscow reportedly demanded sanction immunity in all future trade with Iran.
The U.S. countered Russian demands by saying Moscow had not and would not be sanctioned "for undertaking or participating in nuclear projects that are part of the JCPOA."
Price told reporters last week that the U.S. would not allow the nuclear deal to become "an escape hatch" for Russian sanctions, but refused to say what the current hold up in negotiations are.
"We are still working through a number of difficult issues," Price told reporters Tuesday. "As I said before, the onus is on Tehran to make difficult decisions."
Price refused to outline what the "difficult decisions" for Tehran entailed but said, "We are still at a point where if those decisions are made, we could reach a mutual return to compliance very soon."