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.

But international condemnation against Russia and a globally coordinated sanctions regime – now targeting Russia’s oil exports, its main financial artery – is reverberating through the conference rooms in Vienna.