Donald Trump -Russia sent a memo to NATO members claiming it has information the alliance is preparing an air and naval blockade of Kaliningrad, and warning it would be ready to use nuclear weapons. 🇷🇺You reach for nuclear language about a specific piece of ground when you cannot hold it conventionally, and for all the missiles and air defense packed into Kaliningrad, Russia knows the area can't be defended in a real fight which is precisely why it needs the warning to do the work the ground troops can't.Russia is drawing a nuclear red line around a vulnerability it created. Kaliningrad's whole strategic value is Baltic access.