US Democratic presidential candidate Sen. Barack Obama (D-IL) salutes as he arrives to speak to the Culinary Workers Union local 226 in Las Vegas January 11, 2008. The union endorsed Obama for president earlier in the week with the Nevada caucuses coming on January 19. REUTERS/Rick Wilking
Democratic presidential hopeful, Sen. Barack Obama, D-Ill., arrives for a rally with the Culinary Workers Union Local 226 at union headquarters in Las Vegas, Friday, Jan. 11, 2008.
(AP Photo/Charles Rex Arbogast)
Democratic presidential hopeful, Sen. Barack Obama, D-Ill., is greeted by D. Taylor, Secretary-Treasure of the Culinary Workers Union Local 226, during a rally at union headquarters in Las Vegas, Friday, Jan. 11, 2008. (AP Photo/Charles Rex Arbogast)
Democratic presidential hopeful, Sen. Barack Obama, D-Ill., addresses the Culinary Workers Union Local 226 during a rally at union headquarters in Las Vegas, Friday, Jan. 11, 2008. (AP Photo/Charles Rex Arbogast)