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FILE PHOTO: U.S. Defense Secretary James Mattis looks at U.S. President Donald Trump as he speaks during a meeting with Medal of Honor recipients in the Oval Office of the White House in Washington, U.S.

Daily Video December 21 2018

Defense Secretary Mattis departs President's cabinet

Why have so many high-ranking members left the Trump administration in the last two years? In this NewsHour lesson, discuss why Secretary of Defense James Mattis resigned from President Donald Trump's cabinet.

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Illustrations by Annamaria Ward

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