Washington, Oct. 7 -- US Vice President JD Vance seemingly softened his stance regarding Washington's demands over Iranian nuclear ambitions, saying Tehran needed to make a "meaningful" reduction in its enrichment capacity but stopping short of saying it must abandon enrichment altogether.

Uranium enrichment has been a key issue for the US administration, with President Donald Trump and may of his senior officials repeatedly saying Iran must never be allowed to develop a nuclear weapon.

A day prior to the war's beginning in February, Trump said of Iran's enrichment demands: "They want to enrich a little bit. You don't have to enrich when you have that much oil . I say, no enrichment. Not 20%, 30%. They always want 20%, 30% . They want it ...