Republican Presidential Candidate Donald Trump speaks at a campaign rally on April 6, 2016 in Bethpage, New York.
Andrew Renneisen/Getty Images
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Republican presidential candidate Donald Trump delivers a foreign policy speech at the Mayflower Hotel April 27, 2016 in Washington, DC.
Donald Trump pledged Wednesday to pursue an "American First" foreign policy if elected president, demanding that allies contribute more to global security. "America First will be the major and overriding theme of my administration," he said in a speech outlining his foreign policy.
 / AFP / Brendan Smialowski        (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
BRENDAN SMIALOWSKI/AFP/AFP/Getty Images
Republican presidential candidate Donald Trump delivers a foreign policy speech at the Mayflower Hotel April 27, 2016 in Washington, DC. Donald Trump pledged Wednesday to pursue an "American First" foreign policy if elected president, demanding that allies contribute more to global security. "America First will be the major and overriding theme of my administration," he said in a speech outlining his foreign policy. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
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US Senator Ted Cruz of Texas speaks on the third day of the Republican National Convention in Cleveland, Ohio, on July 20, 2016.
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HAMMONTON, NJ  - MARCH 29:  New Jersey Governor Chris Christie speaks at a Reform Agenda Town Hall meeting at the New Jersey Manufacturers Company facility March 29, 2011 in Hammonton, New Jersey. A State Supreme Court appointed judge ruled on March 22, 2011 that his eight percent education budget cuts last year had violated New Jersey law because the state was unable to fulfil it's educational obligations. (Photo by Jessica Kourkounis/Getty Images)
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HAMMONTON, NJ - MARCH 29: New Jersey Governor Chris Christie speaks at a Reform Agenda Town Hall meeting at the New Jersey Manufacturers Company facility March 29, 2011 in Hammonton, New Jersey. A State Supreme Court appointed judge ruled on March 22, 2011 that his eight percent education budget cuts last year had violated New Jersey law because the state was unable to fulfil it's educational obligations. (Photo by Jessica Kourkounis/Getty Images)
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Republican presidential candidate Donald Trump speaks to guests and supporters during a rally at the Indiana State Fairgrounds on April 20, 2016 in Indianapolis, Indiana.
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