While Barack Obama trailed Hillary Clinton badly among Hispanics during the Democratic nominating battle, he is leading John McCain 59 percent to 29 percent among those voters according to Gallup data collected between March 7 and June 30. Among Hispanics who identify themselves as Democrats, Obama leads 78 percent to 13 percent and 55 percent to 30 percent among independents. About 18 percent of Hispanics say they are Republicans and they favor McCain 75 percent to 21 percent. The edge to Obama cuts across nearly all demographic lines.