Articles on National security

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President Donald Trump with now-former Secretary of State Rex Tillerson, right, and former National Security Adviser H.R. McMaster. AP /Andrew Harnik

Trump national security staff merry-go-round reflects decades of policy competition and conflict

John Bolton just started his job as National Security Adviser to President Trump. He's the latest in a ever-changing cast of staffers, raising the question: Who's in charge of national security?

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