Key Speakers At The Conservative Political Action Conference [Getty Images]

John Bolton, former U.S. ambassador to the United Nations (UN), speaks during the American Conservative Unions Conservative Political Action Conference (CPAC) meeting in National Harbor, Maryland, U.S., on Thursday, March 3, 2016. CPAC runs until March 5 with the five remaining 2016 Republican presidential candidates speaking. Photographer: Andrew Harrer/Bloomberg via Getty Images

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