Yahoo News Now: Kori Schake on Republican national security officials' letter opposing Donald Trump

On Tuesday, Aug. 9, 2016, Yahoo Global News Anchor Katie Couric interviews Kori Schake, Former Director for Defense Strategy at the National Council under the George W. Bush administration, about why she and dozens of other prominent Republican national security officials signed a letter opposing the Republican nominee, Donald Trump. The letter was also singed by well known Republicans including Michael V. Hayden, a former director of both the C.I.A and and the National Security Agency and two former secretaries of Homeland Security, Tom Ridge and Michael Chertoff. ...