Secretary Janet Napolitano will continue to lead the Department of Homeland Security into President Barack Obama’s second term, according to an agency official. That means Napolitano is likely to play a central role should Congress take on immigration reform. Napolitano left her post as governor of Arizona four years ago to join Obama’s cabinet. DHS houses several diverse agencies. Among them are Immigration and Customs Enforcement, Citizenship and Immigration Services, and Customs and Border Protection, which deal with immigration and border issues. Under Napolitano’s watch, deportations ramped up to record levels, which topped 400,000 last year.