President Trump says there's a 'national energy emergency.' Here's what we know

The U.S. is not facing a fuel shortage and is producing more oil and gas than any other country in the world, but President Trump says he is declaring a "national energy emergency."

Here & Now's Scott Tong talks with Michael Gerrard, director of Columbia Law School’s Sabin Center for Climate Change Law, about President Trump's executive action and what it means.