There’s a whole lot of daylight between the U.S. House and the U.S. Senate — literally. The House of Representatives voted last week to make daylight saving time permanent, marking the latest congressional foray into the decades-old battle over whether the U.S. should change the clocks twice a year. Dr. Aatif Husain, Duke School of Medicine Chief of Sleep, joined Jeff Hamlin to discuss how making daylight saving time permanent would impact sleep.