
US-Iran nuclear talks advance to a fifth round despite fundamentally opposed positions on uranium enrichment, with Trump threatening military action if diplomacy fails.
Quick Takes
- The fourth round of US-Iran nuclear talks concluded in Oman with both sides describing discussions as “difficult but useful” despite major disagreements
- Iran insists uranium enrichment is a “non-negotiable” right while US envoy Steve Witkoff maintains “no enrichment” as America’s red line
- President Trump has set a deadline for an agreement and threatened military action if diplomatic efforts collapse
- Negotiations aim to revive diplomacy after Trump withdrew from the 2015 nuclear accord, with Iran now enriching uranium to 60% purity
Stark Differences Remain as Talks Advance
The United States and Iran concluded their fourth round of nuclear talks in Muscat, Oman, with both sides expressing cautious optimism despite fundamental disagreements over Iran’s uranium enrichment program. Discussions have now progressed from general principles to specific details, setting the stage for a fifth round of negotiations. Iranian Foreign Minister Abbas Araghchi acknowledged the increasing difficulty of the talks, noting the transition to more detailed discussions has created new challenges for negotiators from both countries.
Iran maintains that its right to enrich uranium for peaceful energy purposes is non-negotiable, while the US position remains firm that Iran must completely dismantle its enrichment capabilities. This fundamental disagreement represents the most significant obstacle to reaching a comprehensive agreement, with US special envoy Steve Witkoff clearly articulating America’s position.
“An enrichment program can never exist in the state of Iran ever again. That’s our red line. No enrichment. That means dismantlement, it means no weaponization,” said Witkoff.
Trump’s Deadline and Military Threats
The talks have taken on increased urgency as President Donald Trump has established a deadline for reaching an agreement and threatened military action if diplomatic efforts fail. The pressure is intensified by Israel’s influence on US policy, as Israeli officials continue to advocate for a hardline approach. Israel has repeatedly threatened strikes against Iran’s nuclear facilities, viewing Iran’s advancing nuclear capabilities as an existential threat to its security. These dynamics complicate the already challenging negotiations.
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Economic sanctions imposed under Trump’s “maximum pressure” campaign have severely damaged Iran’s economy, with its currency fluctuating and social unrest continuing across the country. A recent deadly explosion in Bandar Abbas has further added to the instability within Iran. These economic pressures may provide leverage for US negotiators, but they also create political difficulties for Iranian leadership in making concessions on what they consider sovereign rights.
Potential Compromise Areas Emerging
Despite the apparent deadlock on enrichment rights, Iranian officials have hinted at potential flexibility on the scale and scope of their nuclear program. Foreign Minister Araghchi suggested Iran might consider placing restrictions on the “dimensions, size, level and amount” of its enrichment activities to build trust, similar to provisions in the 2015 nuclear deal. This indicates that while Iran will not abandon enrichment entirely, there might be room for a compromise that addresses US security concerns.
“Iran may place restrictions on things such as its dimensions, size, level and amount in order to build trust, for example, in a period similar to the previous period,” said Araghchi.
Omani Foreign Minister Badr al-Busaidi has played a crucial facilitation role in the talks, which reportedly included “useful and original ideas.” A senior US official expressed optimism about the negotiations, which have included both indirect and direct exchanges between the parties. The talks aim to prevent Iran from developing nuclear weapons while providing sanctions relief that would allow Iran’s economy to recover from years of isolation from global markets.
Technical Concerns and Verification Issues
The US position that Iran should be treated as a special case, despite other countries being allowed domestic uranium enrichment, stems from Iran’s history of non-disclosure and its current high enrichment levels. Iran is currently enriching uranium up to 60 percent purity, which is close to weapons-grade levels of 90 percent. This has raised serious concerns among international inspectors and Western nations about Iran’s true intentions, despite Tehran’s insistence that its nuclear program is solely for peaceful purposes.
One key issue in the talks is what Iranian officials describe as inconsistency between US statements inside and outside the negotiating room. This lack of clarity has complicated efforts to reach an agreement. Both sides have agreed that Oman will coordinate and announce details of the next round of talks, which are expected to take place within the next week. As negotiations enter this critical fifth phase, the outcome could significantly impact regional security and the future of nuclear non-proliferation efforts in the Middle East.
Sources:
- https://www.theguardian.com/world/2025/may/11/iran-and-us-talks-upbeat-despite-disagreement-over-uranium-enrichment
- https://www.newsweek.com/us-iran-talks-tensions-donald-trump-middle-east-2070763
- https://www.theepochtimes.com/world/us-iran-agree-to-continue-nuclear-talks-after-4th-round-of-discussion-5856206