 That's it for us today. Margaret will be back next week. I'm Robert Costa, and this has been Face the Nation. Today's guests were independent Senator Bernie Sanders, Republican Senator Lindsey Graham, NATO Secretary General Jens Stoltenberg, Democratic strategists and CBS News contributors Ashley Etienne and Joel Payne, CBS News Chief White House Correspondent Nancy Cordes, Wall Street Journal political correspondent Molly Ball, and New York Times Chief Washington Correspondent Carl Hulse.