Former Russian President Dmitry Medvedev, an ally of Kremlin chief Vladimir Putin, warned the North Atlantic Treaty Organization (NATO) on Thursday that the defeat of Russia in Ukraine could trigger a nuclear war. Since Russia invaded Ukraine, Medvedev has repeatedly raised the threat of a nuclear apocalypse, but his admission now of the possibility of Russia’s defeat indicates the level of Moscow’s concern over increased Western weapons deliveries to Ukraine. “The defeat of a nuclear power in a conventional war may trigger a…