Fresh fears over a potential nuclear escalation surfaced Tuesday after JD Vance warned that the United States has "tools in our toolkit that we so far haven't decided to use" against Iran, prompting a rapid rebuttal from the White House as President Donald Trump escalated rhetoric ahead of a deadline tied to the Strait of Hormuz.

Speaking in Budapest, Hungary, Vance added that "the president of the United States can decide to use them, and he will decide to use them if the Iranians don't change their course of conduct," remarks that immediately fueled speculation among analysts and political figures that Washington could be signaling willingness to deploy more extreme military options.

The comments came hours before Trump's self-imposed 8 p.m. Eastern deadline for Iran to reopen the critical shipping corridor, a chokepoint for global oil markets. Earlier in the day, Trump amplified tensions with a message on Truth Social, writing: "A whole civilisation will die tonight, never to be brought back again. I don't want that to happen, but it probably will," while adding that "maybe something revolutionarily wonderful can happen."

The convergence of those statements triggered alarm across diplomatic and defense circles, where ambiguity in language is often interpreted as strategic signaling. Within hours, the White House moved to contain the fallout, posting on X: "Literally nothing @VP said here implies this, you absolute buffoons," directly responding to claims that Vance had hinted at nuclear use.

In a subsequent clarification, the administration reiterated that "only the president knows" what course of action would ultimately be taken, while maintaining its longstanding position that U.S. policy is focused on preventing Iran from obtaining nuclear weapons rather than deploying them.

The exchange underscores the volatility surrounding Strait of Hormuz, through which roughly a fifth of global oil supply passes, and highlights how messaging from senior officials can reverberate across financial markets and military theaters simultaneously.

Iranian officials responded sharply. In a social media post, the Iranian Embassy in Thailand rejected Trump's warning, stating: "Civilisations don't die by bombing." Meanwhile, Islamic Revolutionary Guard Corps spokesperson Ebrahim Zolfaqari dismissed U.S. threats as "baseless," warning that "If attacks on non-civilian targets are repeated, our retaliatory response will be carried out far more forcefully and on a much wider scale."

On the ground, hostilities continued to escalate. Airstrikes targeted infrastructure including bridges and a train station inside Iran, while retaliatory missile launches struck areas in Israel, Saudi Arabia and Bahrain, according to regional officials. Saudi authorities reported damage to an energy facility caused by intercepted ballistic debris, underscoring the expanding geographic footprint of the conflict.

Diplomatic channels remain fragile. Reporting from The New York Times indicated Iran had halted direct negotiations and informed Pakistan-acting as an intermediary-that ceasefire discussions were ending. At the same time, Iranian state-linked messaging suggested "diplomatic and indirect channels of talks with the US are not closed," reflecting a split posture between escalation and negotiation.

The crisis has also drawn scrutiny over the alignment between U.S. intelligence assessments and public rhetoric. The Arms Control Association noted that despite claims from Trump envoy Steve Witkoff that Iran was "probably a week away from having industrial-grade bomb-making material," the U.S. intelligence community's 2026 Worldwide Threat Assessment does not indicate a decision by Tehran to weaponize its nuclear program.

Human rights observers have raised additional concerns about the implications of the administration's language. Kenneth Roth, former executive director of Human Rights Watch, warned that Trump was "openly threatening collective punishment, targeting not the Iranian military but the Iranian people," adding that "attacking civilians is a war crime" and that even such threats "with the aim of terrorising the civilian population" may constitute a violation of international law.