In the past two years, community organizations across the United States mobilized like never before to help Latinos become citizens, register to vote and go to the polls. Now, many of these organizations plan to use that structure to advance the interests of Latinos on issues such as the economy, education and immigration. “The work has just begun,” said David Valladolid, who headed regional efforts to establish Viva Obama clubs and form a coalition with San Diego County's African-American population. The National Association of Latino Elected Officials worked with Spanish-language media and community groups in a get-out-the-vote effort, and it...