President-elect Trump's talk of Canada as a "51st state" and annexing Greenland registered among national-security crowds as an "Oh, boy!" moment. Obnoxious, enticing, familiar. Why it matters: The darlings of Trump's current foreign policy fixation boast Arctic utility at a time when the icy region is heating up.

Denmark’s Prime Minister on Wednesday told Donald Trump that it was up to Greenland to decide on its future, following the US President-elect’s provocative remarks about seizing the island.