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DAYTON, OH - MARCH 12: Republican presidential candidate Donald Trump is surrounded by Secret Service agents during a campaign event on March 12, 2016 in Dayton, Ohio. The agents were responded to a protestor that had rushed the stage while Trump was speaking. (Photo by Brooks Kraft/Getty Images)

DAYTON, OH - MARCH 12: Republican presidential candidate Donald Trump is surrounded by Secret Service agents during a campaign event on March 12, 2016 in Dayton, Ohio. The agents were responded to a protestor that had rushed the stage while Trump was speaking. (Photo by Brooks Kraft/Getty Images)