Concerned about Republican inroads into the Hispanic community, congressional Democrats are trying to fend off a proposed merger between Univision Communications Inc. and the Hispanic Broadcasting Corporation.clip The merger would place Jerry Perenchio, Univision's billionaire CEO and a registered Republican, at the helm of a corporation owning 65 Spanish-language radio stations. The closest competitor, Spanish Broadcasting System (SBS), has 27 stations.clip"If the Univision merger is approved, there may be less diverse programming, news sources, and viewpoints available to Spanish-speaking audiences," Daschle wrote. "This could significantly impact public debate and lead to less local and community-oriented programming." Several weeks earlier, eight...