Neither Greenland nor the EU has been sanctioned by the US.
Have you heard about the judge from international court or whatever it is called?
https://www.france24.com/en/americas/20250820-us-hits-icc-wi...
They haven't been sanctioned, yet, but we live in a time where that's a real possibility.
Yet.
So far
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It is not exactly an outlandish suggestion that this may happen.