Napolitano Resigning Amid U.S. Immigration Debate

Janet Napolitano’s departure as head of the Homeland Security Department leaves President Barack Obama seeking a successor to run an agency at the center of his second-term push to revamp U.S. immigration law.

Napolitano, who has been in the job since the day after Obama took office in 2009, said yesterday she’s resigning to become president of the University of California system. In the cabinet position, her duties included overseeing border security and prevention of terror attacks -- issues that often put her at odds with congressional Republicans.