[treebeard901]

It's a scale between sanctions and other forms of blocking trade. Cutting off Kaliningrad will be a key part of punishing Russia as it moves more into Ukraine. There have been many instances of deliveries turned back through lithuania, sometimes causing massive disruptions to shipping to Kaliningrad. There has been a lot of threats from Russia that if the blockade gets to be fully enforced that they will respond militarily. Having total access to this port is going to be the next phase of the Russian war.

Regardless, without Kaliningrad being a factor, it is still Denmark's responsibility to control those waterways to deny Russia access to the North Atlantic. Having to reinforce Greenland is taking resources away from Denmark enforcing its area in the Baltic Sea.

There is a lot of information about it over the past few years from more international sources. And no, it's not imagined.

The really debatable issue is with the reported attempted agreement by the Trump admin and attempts by Russia to sort of trade Ukraine to Russia for Venezuela. If this turns out to be true, and you can find domestic reporting on this offer having been made a few years ago, then places like Kaliningrad, Estonia and other former Soviet Republics become the next targets.