Then U.S. Democratic presidential candidate Barack Obama (R) appears on stage with Arizona Governor Janet Napolitano during a rally in Phoenix, Arizona in this January 30, 2008 file photo. President-elect Obama is considering Napolitano to be U.S. Homeland Security secretary, heading a sprawling agency formed to bolster civil defense in the wake of the September 11 attacks, a senior Democrat said November 20, 2008. Reuters Pictures 12 months ago

Then U.S. Democratic presidential candidate Barack Obama (R) appears on stage with Arizona Governor Janet Napolitano during a rally in Phoenix, Arizona in this January 30, 2008 file photo. President-elect Obama is considering Napolitano to be U.S. Homeland Security secretary, heading a sprawling agency formed to bolster civil defense in the wake of the September 11 attacks, a senior Democrat said November 20, 2008.