This week, Russian Foreign Minister Sergey Lavrov travelled to Iran, where he met with Iranian President Masoud Pezeshkian and several other officials.
Furthermore, Russia’s relations with Iran, long testy, have markedly improved recently.
Helping the US reach a new nuclear deal with Iran would be clearly in Russia’s interest.
Of those eight, the US withdrew while France, Germany, the United Kingdom and the European Union lost their standing in both Washington and Tehran because of their actions.