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WASHINGTON, DC - APRIL 14: Sen. Marco Rubio (R-FL), and Republican presidential candidate leaves a meeting with Secretary of State John Kerry on Capitol Hill, April 14, 2015 in Washington, DC. Secretary Kerry visited with members of the House and Senate to discuss the ongoing Iran Nuclear negotiations. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - APRIL 14:  Sen. Marco Rubio (R-FL), and Republican presidential candidate leaves a meeting with Secretary of State John Kerry on Capitol Hill, April 14, 2015 in Washington, DC. Secretary Kerry visited with members of the House and Senate to discuss the ongoing Iran Nuclear negotiations.  (Photo by Mark Wilson/Getty Images)