— Updated at 12:46 pm ET with a statement from Jesse Kelly's campaign. See end of post. — A PAC supporting Jesse Kelly, a former Marine running to replace Rep. Gabrielle Giffords in a special election on Tuesday, is using an image Kelly's campaign has avoided thus far — the candidate holding a gun. Kelly, a Republican, ran against Giffords, a Democrat, in 2010. Giffords resigned in January, just over a year after a shooting spree left six dead and the congresswoman critically wounded. Kelly's opponent this time is former Giffords aide Ron Barber, who was shot twice during the...