Has anyone asked a member of the Trump admin this very simple questions: "How would Russia or China get control of Greenland?" Trump himself would give some sort of verbal diarrhea answer but it's the key question. If the answer is "they'll take it by force" then the answer is "WOULDN'T WE STOP THEM IF THEY DID?" We are bound by treaty to militarily protect Greenland! We have military assets there! The idea that Russia or China would launch an overt military strike on Greenland, of all places, through the teeth of the NATO and USA military, is absurd.
And if the answer is "they'll make deals with Greenland to exploit the resources" then WHY DON'T WE MAKE THOSE DEALS OURSELVES? (To the extent we haven't already, that is.) Does Trump think the Greenland government is chummy with Russia or China or something? I mean this is beyond ridiculous.