"Speaking is difficult for me. But I haven’t been silenced," Giffords wrote.
The group is focused on gun control and veterans.
Clinton's vocal push for gun control reportedly played a part in Giffords's call.
The couple has stayed in the spotlight by pushing for gun control reforms.
The pair will fundraise for Rep. Mike Michaud (D-Maine) to help push gun control.
She delivered her remarks at an event honoring powerful Dem female lawmakers.
Wednesday's jump marks the third anniversary of the Tucson shooting.
Former lawmaker blames "coarseness" in politics for British lawmaker's assassination.
Gabby Giffords and Mark Kelley will join Clinton for a rally in Ames.
Obama will reportedly announce changes to gun policy next week.
Ex-congresswoman's gun control PAC airs ads to help vulnerable Rep. Ron Barber (D-Ariz.).
Former Rep. Gabby Giffords (D-Ariz.) asked the Senate Judiciary Committee to hold a hearing on...
Gabby Giffords's gun control group will air a television ad demanding action on background checks...
Clinton and Giffords appeared together at the Glamour Women of the Year Awards.