While Congress debates the harm Facebook does to kids, Alaska U.S. Sen. Dan Sullivan suggests the federal government should borrow an idea from the Chinese regime and impose limits on screen time. “I personally believe that we’re going to look back, like 20 years from now, and see the massive social, mental health challenges that were created by this era when teenagers had phones in their faces, starting in seventh and eighth grade and continuing,” Sullivan said at a recent Senate hearing about Facebook. “And we’re going to look back and we’re going to go, ‘What in the hell were…