The Democratic primary to fill the seat vacated by the death of Representative Raúl M. Grijalva in Arizona’s deep blue Seventh Congressional District in Tucson will be a contest between legacy and change.

Foxx has also been endorsed by the progressive advocacy group Gen-Z for Change. The organization’s Executive Director Cheyenne Hunt, who ran in a primary for a House seat in California last year, emphasized that the Arizona race was a key opportunity to uplift young leaders in the party.

Tensions within the Democratic Party over age, representation and experience have roiled a special election primary in southwest Arizona, where a young, social media-savvy activist is taking on the daughter of Rep.