U.S. Hope for Iran Nuclear Talks Now Rests on China, Russia

VIENNA—With talks on restoring the 2015 nuclear deal at danger of collapse, the Biden administration faces the prospect of having to depend on two of its largest global rivals, Russia and China, to end the nuclear standoff with Iran.

Even as U.S. tensions mount with Russia around Ukraine and with China around Taiwan and other problems, Western officials admit that the fastest route to escalating economic and political force on Tehran’s new difficult-line federal government runs via Moscow and especially Beijing.