Some critics have warned that American support for Ukraine means the U.S. is effectively waging a proxy war with Russia and, in doing so, threatening to drag us into WWIII. There’s been much intellectual debate over whether that’s a frighteningly cogent assessment or just melodramatic hyperbole,

Vladimir Putin says Russia would consider an attack from a non-nuclear state that was backed by a nuclear-armed one to be a "joint attack", in what could be construed as a threat to use nuclear weapons in the war in Ukraine.