Kremlin spokesman Dmitry Peskov said Tuesday that Moscow is not ruling out a nuclear strike under circumstances outlined in its military doctrine, including if Russia faces an “existential threat.” Peskov was responding to a question by CNN’s Christiane Amanpour during an interview in which he was asked to confirm that Russian President Vladimir Putin would “never use a nuclear weapon.” The spokesperson declined to rule out a nuclear strike, while making reference to Russian military doctrine that allows the use of nuclear weapons under certain circumstances, even in conventional arms conflicts. “We have a concept of domestic security, and it’s public. You can read all the reasons for nuclear arms to be used,” Peskov said. “So if it is an existential threat for our country, then it can be used in accordance with our concept.” Peskov was presumably referring to a presidential directive on nuclear deterrence, which was published in June 2020 …