Anti-Kryptos.com reports: While there is no hard evidence at this point to suggest that the shooting was politically motivated, Matt Yglesias points out that an anti-Giffords event was held in June with the billing: "Get on Target for Victory in November. Help remove Gabrielle Giffords from office. Shoot a fully automatic M16 with Jesse Kelly." (Jesse Kelly - a Tea Party supported candidate!)
Rep. Giffords was also on Sarah Palin's "target list."
As noted earlier, a gun was dropped at a Giffords event in 2009, and her office was vandalized in March.
Firedog lake.com reports: Giffords’ 2010 Congressional opponent Jesse Kelly held a June 12 gun event that was billed as follows on the Pima County Republican website: "Get on Target for Victory in November Help remove Gabrielle Giffords from office Shot a fully automatic M15 with Jesse Kelly."