DES MOINES, IA - AUGUST 17:  Republican presidential candidate and U.S. Sen. Lindsey Graham (R-SC) prepares to speak to fairgoers during the Iowa State Fair on August 17, 2015 in Des Moines, Iowa.  Presidential candidates are addressing attendees at the Iowa State Fair on the Des Moines Register Presidential Soapbox stage and touring the fairgrounds. The State Fair runs through August 23.  (Photo by Justin Sullivan/Getty Images)