LAS VEGAS, NV - JULY 14: Culinary Workers Union Local 226 Secretary-Treasurer Geoconda Arguello-Kline (C) and other union members protest an appearance by U.S. presidential candidate and Wisconsin Gov. Scott Walker at Red Rock Harley-Davidson on July 14, 2015 in Las Vegas, Nevada. Walker launched his campaign on July 13, joining 14 other Republican candidates for the 2016 presidential race. (Photo by Ethan Miller/Getty Images)
