Does President Trump have the authority to shut down government agencies?

The Trump administration is moving to shut the independent agency USAID down and move its functions to the Department of State. The agency was created by congress. Does he have the authority to close it and other U.S. agencies he said he wants to shut down? Several Democratic senators say he doesn’t and are vowing to block confirmations of President Trump’s State Department nominees in protest. We speak with David Super professor of law and economics at Georgetown Law.