Latino USA Story: Maria Hinojosa speaks with Illinois Senator Barack Obama about the immigration debate. She then speaks with NPR News Senior Washington Editor Ron Elving about immigration and national politics. Next, she speaks with self-proclaimed anti-illegal alien activist D.A. King about the recent immigration protests. Finally, Hinojosa shares her experience of taking her children to a recent immigration demonstration. Latino USA contributor Nancy Mullane reports on a new California exhibit that celebrates 150 years of contributions to the state by Latinas.