Last year Trump withdrew from a 2015 global accord with Iran which had put limits on Tehran's nuclear program in exchange for sanctions relief.
"Mr. Trump exited without a valid justification, and illegally, from an worldwide agreement".
A single blunder can fuel a big fire.
But his top advisers, like Secretary of State Mike Pompeo, have pushed to keep "maximum pressure" in place, condemning any effort at mediation that involves providing economic relief to Iran.
"If he leaves the country without meeting with President Trump, honestly this is a lost opportunity because he will not come back in a few months", Macron said.
Numerous world's leaders have used their speeches so far to defend the multilateralism embodied by the UN at a time when the USA and other nations are sliding toward unilateralism and going it alone.
The General Debate section comes a day after the United Nations held a major summit on climate change.
However, Trump also said there was a path to peace and Rouhani, the nuclear pact's architect, has left the door open to diplomacy, saying that if sanctions were lifted, Washington could join nuclear talks between Tehran and other powers.
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But Rouhani has hinted at only the faintest possibility of a breakthrough.
Khan yesterday said that he was "acting as a mediator" with Iran at the request of the US President Donald Trump and the Saudi Crown Prince Mohammed Bin Salman.
Recent U.S. sanctions have further hit Iran's struggling economy while the regime resumed enriching uranium to limits beyond those set in the old agreement made with the Obama administration and world powers.
The most stunning attack unfolded earlier this month when drones and missiles struck key oil sites in Saudi Arabia, jolting global oil prices and temporarily knocking out almost 6% of daily global crude oil production.
On Monday, France, Britain and Germany issued a joint statement saying it was clear that Iran was responsible for the attack, but also calling for a return to the negotiating table.
"Therefore, the ball is in the American's court now", Rouhani said.
About 24 hours before Rouhani's speech, Trump tried to rally the world against Iran from the same stage.
"Our response to talks under pressure is 'No, '" Rohani told world leaders gathered at the United Nations headquarters in NY on September 25, adding that Iranian officials can not negotiate with "people who claim to have applied the harshest sanctions in history".
Prospects for a broad pact led by Tehran look unlikely as several of the Gulf Arab states have tense relations with Iran.