As Vice President Kamala Harris and her team weigh her running mate options, one of her top contenders, Sen. Mark Kelly (D-AZ), comes with a powerful spouse, former Rep. Gabrielle Giffords, a leader in the movement to end gun violence after she survived an assassination attempt in 2011.

Giffords, who married Kelly in 2007 and leads a national gun control organization, has been hitting the campaign trail for Harris in battleground states, with stops in Grand Rapids, Michigan, on Monday and last week in Philadelphia. According to Giffords aides, the former Arizona congresswoman’s appearances had long been planned even before her husband was under consideration to be Harris’s running mate.