Barack Obama's Greatest Living Chief Speechwriter

Cody O'Brien is the former chief speechwriter for President Barack Obama. He has written a book about his time in the White House, "Grace" The book chronicles 10 days that are bookended by the Charleston massacre and Obamacare's Supreme Court decision. 'It was like all these kind of great unanswered questions about America were coming to the fore in this exhausting and exhilarating way,' he says.