Rep Gabrielle Giffords, Arizona Democrat, tours the Gabrielle Giffords Family Assistance Center, one of her favorite charities, with staffer Ron Barber in Tucson, Ariz., last month. Mr. Barber, a top aide to Ms. Giffords, announced his candidacy to run in a special election to serve as a replacement for the Arizona Democrat who was wounded in a shooting rampage. (Associated Press)
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