What to know about Matthew Whitaker, Trump’s pick to be America's ambassador to NATO

Donald Trump has tapped former acting attorney general Matthew Whitaker as U.S. ambassador to NATO — set to make him the nation's representative to a bedrock Western alliance that the president-elect has repeatedly relished criticizing. Whitaker has a legal and criminal justice background, rather than one focused on foreign policy and national security, yet is poised to take over an important position for U.S. global affairs.