President Donald Trump says the United States needs to purchase Greenland for national security purposes and has threatened military action to take over the Arctic island. The people of Greenland say their country is not for sale. European allies are pushing back and have increased their military presence on the island. In response, Trump threatened to impose 10% tariffs on Denmark, Norway, Sweden, France, the United Kingdom, the Netherlands and Finland starting Feb. 1 and rising to 25% on June 1 if no deal is reached. He says the tariffs will stay in effect until the U.S. takes control of Greenland. Are these actions the beginning of the end of NATO? Will the president's actions destroy relationships with our allies? How will China and Russia take advantage of the looming divide? Political and legal analyst Dr. Eric Claville provides perspective on the U.S. role in world politics.