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