That may be because they don’t want to go against the prevailing mood and they certainly don’t want to be seen as being on the same side of the argument as Israeli Prime Minister Benjamin Netanyahu, who has called the deal a mistake of “historic proportions”. Israeli opposition leader Isaac Herzog is also due to visit Washington, partly to push for security guarantees.

US President Barack Obama told critics of the deal that they were at odds with “99 percent” of the world on Wednesday. The issue is either resolved “diplomatically, through a negotiation, or it’s resolved through force”. Obama’s Republican rivals, who hope to scupper the agreement in a planned Congressional vote, have accused him of appeasement.

Speaking alongside the Foreign Secretary ahead of their talks, Mr Netanyahu said it was “perplexing” that the deal did not address Iranian threats to annihilate Israel.

The agreement would not end “profound differences” with the Shiite-majority Islamic republic, he said, stressing that Washington s alliances in the Middle East would not be affected.

Kermani’s criticism underlined concerns expressed in the past two days by some conservative figures within Iran’s political establishment and media, and repeated the term Khamenei used to describe some of Tehran’s negotiating partners – “untrustworthy”.

Bringing the talks to a close was a “milestone”, Khamenei said, but the agreement requires “careful scrutiny” before it is approved. “You are well aware that some of the six states participating in negotiations are not trustworthy at all”, Khamenei said.

The nuclear agreement was struck in Vienna this week after nearly two years of negotiations which culminated in a final 18-day stretch of virtual round-the-clock talks.

Tehran: Iran’s president has pointed to another possible windfall from the nuclear deal with world powers his country may soon be able to buy badly needed new planes for its aging fleet.

TEHRAN, Iran (AP) – The main prayer service in the Iranian capital has been interrupted by repeated chants of “Death to America” – despite this week’s landmark nuclear deal with world powers that was welcomed by authorities in Tehran. Iranians are hungry for relief from withering economic sanctions, and it is unclear if the timeframe Rouhani’s team has agreed to will live up to expectations. The alternative is a better deal that would roll back Iran’s military nuclear program and tie the easing of restrictions on Iran’s nuclear program to changes in Iran’s behaviour.