Dmitry Medvedev, former president of Russia and current deputy head of its security council, on Saturday said Moscow could resort to a nuclear strike even in a conventional arms conflict, with his remarks coming just days after he warned of a nuclear dystopia if Washington pressed on with what he claimed was a plot to destroy Russia. Madvedev revived the specter of a nuclear strike in an interview with state-backed media RIA Novosti, in which he outlined Russia’s military doctrine that allows for the use of atomic weapons even in a conventional arms conflict if it posed an existential threat to Russia. “We have a special document on nuclear deterrence. This document clearly indicates the grounds on which the Russian Federation is entitled to use nuclear weapons,” he said. “Number one is the situation when Russia is struck by a nuclear missile. The second case is any use of other nuclear …