Giffords was shot in the head at a mass shooting at a constituent event in 2011. Her medical injuries forced her to step down from Congress, but outside of office she has become a high-profile advocate against gun violence.
Giffords offered dramatic testimony before Congress earlier this year in the aftermath of the deadly shooting at an elementary school in Connecticut.
"Violence is a big problem. Too many children are dying. Too many children. We must do something,” Giffords told the Senate Judiciary committee.
Giffords and her husband also formed a new PAC this year to urge new laws to prevent gun violence and to counter the power of the nation’s gun lobby.
The group has been running ads pressing senators to support legislation to expand background checks for firearm purchasers.