John Bolton, the US national security adviser, is expected to deliver a fierce warning against Tehran at an anti-Iran conference taking place in New York later today.
In his speech, Mr Bolton will openly threaten Iran’s govenrment, using a tone set to spark fear of an upcoming conflict between the two powerful countries.
Mr Bolton will say: «Let my message today be clear: We are watching, and we will come after you.»
He will also speak directly to the country’s clerics, urging them not to «cross us our allies or our partners», unless they don’t want to face severe consequences.
Mr Bolton will add: «There will indeed be hell to pay.»
The heated messages will come after Mr Rouhani hit out at the US during his speech to the General Assembly, arguing the current administration has been behaving like a «bully».
He said: «The word is suffering from recklessness and disregard of international institutions from some states.
«The government of the US current administration is determined to render all international institution ineffectual.
«It withdrew from an agreement which was approved unanimously by the United Nations and invites us to bilateral talks.»
Pulling out of the Iran nuclear deal signed by Barack Obama in 2015 indicates Mr Trump’s administration isn’t trustworthy, Mr Rouhani continued.
He added: «On which bases and criteria can we enter talks with someone who have breached agreements?»
Mr Trump’s decision to leave the deal not only signal a «violation of policies» issued by his predecessor, but is also «unilateral and illegal», the Iranian leader continued.
He added Mr Trump is inviting others nations who entered the deal in 2015 to trash the agreement, resorting even to threats to achieve the complete isolation of Iran.
This approach to world politics, Mr Rouhani added, is «unlawful and unilateral», and is a form of «economic terrorism» with worldwide consequences.
Mr Rouhani said: «The economic war that the United States has initiated under the rubric of new sanctions not only targets the Iranian people but also entails harmful repercussions for the people of other countries, and that war has caused a disruption in the state of global trade.
«What Iran says is clear: no war, no sanctions, no threats, no bullying; just acting according to the law and the fulfillment of obligations.»
Speaking about the Iranian deal, Mr Rouhani added: «The US approach to the deal has been wrong from the beginning.
«But this administration has an authoritarian understanding of international relationship.
«No state or nation can be brought to negotiation by force.»
Mr Rouhani spoke just hours after Mr Trump’s delivered his speech, where he accused Iran of sowing «chaos, death and destruction.»
Mr Trump added: «They do not respect neighbours or borders of soveregneity of nations.
«They enrich themselves and spread mayhem across middle east and far beyond.
«All nations should isolate Iran’s leadership as long as their aggression continues».
However, before taking the stage, Mr Trump conceded he is open to the possibility to meet Iran’s leader in the future — but only after they will «change their tune.»
He said: «I’m not meeting with them until they change their tune. It will happen.
«I believe they have no choice. We look forward to having a great relationship with Iran, but it won’t happen now.»