Stockton Unified School District Police Officer Myra Franco and Chief Jim West patrol 50 schools in California's Central Valley region. One of the campuses was the site of a 1989 shooting massacre. Richard Gonzales/NPR hide caption

itoggle caption Richard Gonzales/NPR

Meng So, coordinator of the University of California, Berkeley's Undocumented Student Program, says students he helps are from low-income families with no experience navigating a university such as Berkeley. So calls undocumented students "underground undergrads." Carol Ness/UC Berkeley hide caption

itoggle caption Carol Ness/UC Berkeley

Democrat Ami Bera is challenging Lungren. Bera ran against Lungren in 2004 and lost, but since the district was redrawn, the race has become competitive. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP