It's not even possible. In the event of a sale of Greenland, the UK has dibs, and there's no way their failing economy would also want the alleged riches in the underground. But why would someone in the legislative branch care about International agreements in the face of the US Anschluss?
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https://youtu.be/admRGOQQ6v8?feature=shared
Well not sarcasm, but "Sarcasm," I guess.