In a turnaround last week, the federal government announced a new policy that offers a reprieve from deportation for thousands of undocumented immigrants. The policy, which Department of Homeland Security Secretary Janet Napolitano announced Thursday, would shift the government’s deportation priorities to focus primarily on those who pose a threat to national security or public safety, and to put less emphasis on deporting undocumented immigrants with clean criminal records. Under these new terms, the government will reassess some 300,000 pending deportation cases and review them on a case-by-case basis.