File photo of Ron Barber at a voting center at St. Cyril's Catholic Church in Tucson

 
File photo of Ron Barber at a voting center at St. Cyril
Democrat Ron Barber, former aide to Gabrielle Giffords and currently running for her former post, is seen at a voting center at St. Cyril's Catholic Church in Tucson, Arizona in this June 12, 2012 file photo. Democratic U.S. Representative Barber, a former aide to Giffords who was wounded alongside her in a deadly 2011 shooting, said on November 27, 2012 he is recovering after surgery to remove a cancerous tumor from his tongue. REUTERS/Samantha Sais/Files