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An elderly woman walks along Middlefield Rd., known as "Little Mexico," in Redwood City, Ca., on Tuesday, May 10, 2011. Along the San Francisco peninsula, just beyond the city's suburbs, a group of Asian Americans and Latinos are suing San Mateo County for what it calls a discriminatory voting system. The county has elected no Asians and just one Latino supervisor in the past 25 years even though its population is now a quarter Latino and a quarter Asian.