GOP Presidential Candidate Jeb Bush Campaigns With His Brother Former President George W. Bush [Getty Images]

NORTH CHARLESTON, SC - FEBRUARY 15: Republican presidential candidate Jeb Bush looks on as his brother, former President George W. Bush (R) speaks at a campaign rally on February 15, 2016 in North Charleston, South Carolina. The Bush campaign is seeking support in South Carolina, where George W. Bush is popular with the state's large military population, before the Republican primary on Saturday, February 20. (Photo by Spencer Platt/Getty Images)

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