A U.S. attempt to seize Greenland by force would trigger "monumental consequences" for the Western alliance and the global order, said former Icelandic President Olafur Grimsson.

President Donald Trump said Sunday that the United States will take Greenland "one way or another, and Europe is stepping up in defense.

A U.S. attempt to seize Greenland by force would trigger "monumental consequences" for the Western alliance and the global order, said former Icelandic President Olafur Grimsson.