Iranian President Masoud Pezeshkian told the United Nations on Thursday that Tehran would never "bend the knee" to the United States, directly rejecting President Donald Trump’s warning that he would "annihilate" Iran if a peace agreement was not reached soon.

"We will never bend the knee to anyone," Pezeshkian said.

The blunt exchange came after Trump, in a 40‑minute address to the General Assembly, warned that the United States would take decisive action against Iran unless Tehran agreed to a settlement on its nuclear programme. The president’s remarks, delivered eleven minutes into his speech, marked an unprecedented level of hostile rhetoric aimed at a fellow UN member.

Rising Tensions at the UN

Trump’s declaration, which he framed as a “big decision” over Iran, raised alarms among diplomats who said it threatened the fragile diplomatic balance that has held since the 2023 nuclear accord. The International Crisis Group’s Richard Gowan warned that the language could "escalate a dangerous confrontation" and undermine ongoing negotiations.

U.S. officials later clarified that the threat was not a formal policy statement, but the ambiguity left allies and adversaries alike uncertain about Washington’s next move.

Iran’s Defiant Reply

Pezeshkian’s speech, delivered in Persian and translated for the assembly, emphasised Iran’s sovereignty and its right to self‑defence. He cited the country’s “determined resistance” and warned that any attempt to force a settlement would only deepen regional instability.

The president also called on the international community to “respect Iran’s legitimate security concerns,” echoing Tehran’s longstanding position that any nuclear deal must guarantee its right to peaceful nuclear technology.

Global Reactions and Domestic Backlash

Across the Atlantic, European foreign ministries urged restraint, with the UK’s Foreign Office describing Trump’s remarks as "dangerously inflammatory". Meanwhile, within the United States, a growing cohort of Republican lawmakers expressed unease, noting that public support for a renewed Iran conflict has slipped in recent polls.

According to a recent TIME analysis, an increasing number of GOP candidates are distancing themselves from the president’s hardline stance, arguing that a military escalation would be politically costly.

Implications for Regional Stability

The exchange at the UN highlights a broader diplomatic crisis that could affect the Middle East’s security architecture. If Washington were to follow through on its threat, the risk of a wider confrontation involving Israel, Saudi Arabia and other regional actors would rise sharply.

Analysts warn that any miscalculation could reignite the proxy wars that have simmered since the 2020s, potentially drawing in Russian and Chinese interests that have been courted by Tehran.

For now, the United Nations has called for an emergency meeting of the Security Council to discuss the escalating rhetoric. Tehran has signalled it will attend, but has warned that any discussion that does not acknowledge its security guarantees will be “fruitless”.

Both sides appear poised for a diplomatic showdown in the weeks ahead, with the next UN session scheduled for late October likely to become the arena for any breakthrough—or further deterioration.