The official, who spoke on condition of anonymity to discuss the sensitive talks, told reporters that while a political framework is largely in place, the precise nuclear restrictions and verification mechanisms will require months of additional work to be fully realized. The assessment marks the most explicit public confidence level offered by the Biden administration since negotiations resumed in Vienna.
Diplomats from the remaining parties to the 2015 nuclear deal, known as the Joint Comprehensive Plan of Action, have been shuttling between capitals in recent weeks to narrow differences on key issues including the scope of uranium enrichment and the timing of sanctions relief. The official described the current window as a decisive moment, though they cautioned that nothing is final until all parties sign.
The 80 to 85 percent probability cited by the official reflects what they described as a genuine breakthrough on the broad political contours of a renewed agreement. However, they stressed that translating those principles into enforceable technical annexes will require sustained negotiations that could stretch well into the autumn.
Critics of the emerging deal have warned that any agreement leaving Iran with a reduced but still significant enrichment capability would fail to address long-term proliferation risks. The official pushed back against that characterization, arguing that the proposed restrictions would provide a robust monitoring regime and a shorter breakout time than Iran currently possesses.
The timeline for implementation remains a central point of contention. The official acknowledged that even after a political deal is announced, it could take months for Iran to comply with nuclear rollbacks and for the United States to unwind sanctions. They described this phased approach as both necessary and realistic, given the complexity of the technical work involved.
European allies have privately expressed frustration with the pace of the talks, but the official insisted that the United States and Iran have now aligned on the fundamental trade-offs required. The remaining gaps, they said, are narrow enough to be bridged in the coming weeks if political will holds on all sides.
The outcome of these negotiations carries significant implications for global oil markets, regional security in the Middle East, and the broader nonproliferation regime. The official declined to set a deadline for a final announcement, but they made clear that the window for a deal will not remain open indefinitely.
