Former U.S. ambassador to NATO breaks down Trump's foreign policy approach to Greenland

President Trump insists the U.S. needs Greenland to bolster its national security, which has belonged to Denmark for more than two centuries. His efforts are facing strong opposition from European allies in NATO. Former GOP Sen. Kay Bailey Hutchison, who was U.S. ambassador to NATO during Mr. Trump's first term, joins "CBS Mornings" to discuss his foreign policy approach and its impact with U.S. allies.