Obama, who has struggled to overcome Clinton's significant advantage among Latino voters in state after state, sought to one-up his rival for the Democratic presidential nod by joining the call for creating a national holiday to commemorate the father of the United Farm Workers. "That's why I support the call to make Cesar Chavez's birthday a national holiday. It's time to recognize the contributions of this American icon to the ongoing efforts to perfect our union." Eight states commemorate Chavez' birthday in some fashion. In California, all state offices are closed, but local government facilities and public schools are open....