Face the Nation with Margaret Brennan

9/8: Mike Pompeo, James Mattis, Chris Coons (2019x35)

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This week on "Face the Nation," we examine how America's role in the world has changed since 9/11. Margaret Brennan talks to Secretary of State Mike Pompeo, former Defense Secretary James Mattis and Senator Chris Coons. Plus, a new CBS News poll on the Democratic primary race across 18 early states.