Additionally, Russia has a significant nuclear arsenal. The word on the tweets is that NATO going head-to-head with Russia would mean two significant nuclear po

Additionally, Russia has a significant nuclear arsenal. The word on the tweets is that NATO going head-to-head with Russia would mean two significant nuclear powers fighting directly, making a significant risk of escalation. (NATO contesting air superiority over Ukraine would mean launching attacks on Russian air defenses over the border, for example.)