When the University of California regents were looking for a new president for perhaps the best public university system in the world — with 10 campuses and more than 230,000 students — they chose Homeland Security Secretary Janet Napolitano? What? Maricopa County Sheriff Joe Arpaio wasn’t available? At UCLA, UC Berkeley, and the other UC campuses, students who are undocumented immigrants — the so-called DREAM’ers — should be packing their stuff and seeking sanctuary at the nearest community college. One day, all UC students might need to produce their green cards, birth certificates, or proof of citizenship when they enroll. Soon there will be a new sheriff in town. One who makes Wyatt Earp look like Andy Taylor. Ruben Navarrette Jr. It’s easy to see why Napolitano might wants this plum assignment — outgoing president Mark Yudof makes $591,000, triple her salary at DHS. (Yudof’s total compensation: $847,149). The real question is why should Californians want her?