Newsweek has reached out to the U.S. State Department for comment. Why It Matters. The remarks are the first time Tehran has commented on the content of the recent U.S. proposal,

Iran’s Supreme Leader Ayatollah Ali Khamenei criticized a US proposal for a nuclear deal and called American officials “arrogant” for expecting the Islamic Republic to cease uranium enrichment.

Iran's Supreme Leader Ayatollah Ali Khamenei said on Wednesday Tehran will not abandon its uranium enrichment, rejecting a key U.S. demand aimed at resolving a decades-long nuclear dispute, that he said was against the Islamic Republic’s interests.