An Arizona special election primary Tuesday to replace the late Rep. Raúl Grijalva is the latest flare-up of the Democratic Party’s clashes over age and experience.

Pima County Supervisor Adelita Grijalva secured the Democratic nomination on Tuesday for the special election in Arizona for her late father’s seat, giving her a clear path to victory in the deep blue district.

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.