Russia’s war on Ukraine upends nuclear talks with Iran

Russia’s invasion of Ukraine is throwing into doubt global efforts to revive the nuclear deal with Iran, just as international mediators appeared poised to announce a breakthrough.

Negotiators from the U.S., Europe, Russia, China and Iran had largely managed to seal themselves off from outside crises around the globe over nearly a year of talks in Austria.

Iran’s President Ebrahim Raisi said Tuesday that Tehran would not abandon its “red lines” over rejoining the deal, which are said to include guarantees that would bar any future U.S. presidential administration from withdrawing from the deal, lifting all sanctions and allowing Iran a measure of recourse if United Nations sanctions were reimposed in a so-called “snap-back”, according to Iran’s semiofficial FARS News agency.