Trump warned Iran to abandon its nuclear program or face harsh consequences.
The US sanctioned five Iranian entities for nuclear activity, just days before planned nuclear talks in Oman, as Trump warns of consequences if talks fail.
Iranians are cautiously hopeful ahead of US nuclear talks, as markets rise and the rial strengthens, but fears of failure and conflict linger.
The bleak assessment from Moscow comes amid the disintegration of the tangle of arms control treaties which sought to slow the arms race and reduce the risk of nuclear war.
"Indirect talks offer a chance to evaluate Washington's seriousness about a political solution with Iran," said an official.
France's foreign minister warned that a military confrontation with Iran is likely if a nuclear deal is not reached soon.
Macron held a meeting on Iran’s nuclear program amid rising US tensions. Europe is pushing for a new deal with Iran by August.
Iran is saying it has a right to develop all the components to build a bomb, and if the US tries to stop it, then Iran will build a bomb.
Khamenei referred to Trump's remarks that "If they don't make a deal, there will be bombing...the likes of which they have never seen before."
The report comes amid contact between the Islamic Republic and the US over reported efforts to reach a nuclear deal.