Since his first term, President-elect Donald Trump has insisted that the United States should purchase Greenland - to the bewilderment of aides asked to investigate such a possibility, and despite repeated denials by top officials in Greenland and Denmark, of which the island is an autonomous territory, that it would ever be for sale at any price.

Treaties ratified by the Senate in 1978 established permanent neutrality, but some Republicans regret that decision.

First it was Canada, then the Panama Canal. Now, Donald Trump again wants Greenland. The president-elect is renewing unsuccessful calls he made during his first term for the U.S. to buy Greenland from Denmark,