Can a Native American tribe stop a wall from being constructed on their reservation? The government shutdown is now in its third week, with no end in sight. At the center of the impasse is nearly $6 billion in funding that President Trump is demanding to build a border wall between the U.S. and Mexico. But a Native American tribe whose land sits in both countries says it is adamantly opposed to a wall, and will do everything in its power to stop it from being built along a 75-mile stretch of their reservation in Arizona's Sonoran Desert. NewsHour Weekend Special Correspondent Christopher Livesay reports.