According to him, Washington considers diplomacy the best way to deal with the "threat of the Iranian nuclear program."

“We are actively involved in diplomacy, but if Iran is not ready or unable to do what is necessary to return to compliance, then this is also part of the equation,” TASS quoted him as saying.

Earlier, Pentagon Deputy Head for Political Affairs Colin Kahl said that the issue of restoring the Joint Comprehensive Plan of Action on the Iranian nuclear program had lost its relevance in the short term.

US President Joe Biden admitted that the Iran nuclear deal is already dead, but refused to announce it officially.