In the revealing new book by ABC News anchor George Stephanopoulos, "The Situation Room: The Inside Story of Presidents in Crisis," former Defense Secretary Jim Mattis's deep-seated disdain for ...

General Jim Mattis, former U.S. Secretary of Defense under President Donald Trump, spoke about the need to preserve American ...

On Thursday Gen. Jim Mattis, Trump’s defense secretary from 2017 to the start of 2019, joined other former secretaries of defense to call on Congress to hold immediate hearings to assess the ...