Calif. Gov. Gavin Newsom on changes to auto emission rules

President Trump has announced that states will no longer be able to set their own fuel mileage and emissions standards, as they previously were empowered to do. California, for example, had an agreement with several automakers for voluntary adherence to tougher standards. Its Democratic governor, Gavin Newsom, joins Judy Woodruff to discuss why the policy change could be "catastrophic.”