Just so everyone is clear, Greenland has a population approximately the same as Grand Forks, North Dakota. Or Hempstead, NY, or Fountainbleu, Fl. So let's stop calling it a "country" or a "Nation". It is equivalent in population to a very small city in the US. For example, Irvine California is owned by the Irvine corporation. No one fought a civil war over some company owning a city in the US. BTW, Irvine is more than 5x bigger than the population of Greenland.
So do you think Congress will approve of an Greenland invasion or will we have to pull our troops out after 60 days?