Palais Coburg in Vienna where negotiations to revive the 2015 Iran nuclear deal are being held. Photo: Reuters/Leonhard Foeger An Iranian nuclear negotiator has accused the US and its allies of exploiting the Russian invasion of Ukraine to try and railroad the Tehran regime into a “bad deal” on its nuclear program. Mohammad Marandi — an adviser to the Iranian negotiating team currently in Vienna seeking a revival of the 2015 nuclear deal — said on Tuesday that American and European negotiators were “stonewalling” and raising issues that he claimed were “not even relevant to the nuclear negotiations.” He said...