Hassan Rouhani, Iran’s president, will face major resistance from the country’s supreme leader and its hardliners in his bid to save the landmark nuclear deal.

Despite Mr Rouhani’s assurances that Donald Trump’s decision to back out of the agreement would not spell its end, conservative elements in Iran have already begun celebrating its demise.

During the opening session of parliament on Wednesday, a group of hardline MPs set fire to a paper US flag and the text of the nuclear deal as they chanted “death to America”.

Supreme Leader Ayatollah Ali Khamenei said Iran's government faced a big test to preserve "the dignity and the grandeur of the Iranian people" and warned against trusting foreign leaders.