This interview is first aired in 2006, but it features linguist Carmen Fought–a specialist in Mexican American English–speaking on the effects of an official English Only policy. The immigration debate has only heated up since then, so the debate is still relevant. Check out video on the link below:
For more information on U.S. English, who is represented by Mauro Mujica in this video, you should check out their own pages and information on the history of the organization. As you research this history, pay particularly close attention to the Witan Memo, which makes clear that the goals of this organization are not merely related to English language policies. You can also search for information on John Tanton, a Michigan optometrist who has a long history with this organization and others like it, including FAIR.