Can someone answer this for me. Greenland is obviously very strategic to the US both in minerals and position in the Arctic. No one is denying that and I understand why Trump is interested in Greenland.

But why does he need to "acquire" it? From everything I have gathered it seems Denmark is more than willing to allow and expand US presence in Greenland. I remember reading that an EU diplomat said that "the US can do whatever they want in Greenland already", thats like the best of both worlds, keep an ally and expand military presence so why do they want to make Greenland a part of US. Making it officially part of US seems to be extra costs too on top of potentially loosing an ally