Donald Trump has cast serious doubt on the prospects of a swift diplomatic resolution with Iran, posting a characteristically blunt message on his Truth Social network that suggests any plan submitted by Tehran will face a very high bar in Washington.
"I will soon be reviewing the plan that Iran has just sent to us, but can't imagine that it would be acceptable in that they have not yet paid a big enough price for what they have done to Humanity, and the World, over the last 47 years," Trump wrote on Truth Social.
The post confirms that Iran has submitted a formal plan to Washington, a significant diplomatic development in itself, coming amid the fragile ceasefire in place since 7 April and ongoing negotiations over Tehran's nuclear programme and regional behaviour.
But Trump's tone on Truth Social leaves little room for optimism about an imminent breakthrough.
The reference to 47 years - dating back to the 1979 Islamic Revolution and the subsequent hostage crisis, signals that the US president views the current negotiations not merely as a tactical adjustment, but as a moment of historic reckoning for the Islamic Republic.
The post also reinforces Trump's broader negotiating posture: maximum pressure, minimal concessions, and a public signal to Tehran that whatever it has offered is almost certainly not enough.
Iran, navigating a leadership crisis following the death of Supreme Leader Ali Khamenei in March, with its economy in "a state of collapse" by Trump's own admission and its military severely degraded, now awaits Washington's formal response.