CNN  —  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. Raúl Grijalva, who died in March . Former Pima County Supervisor Adelita Grijalva, 54, has sought to strike a balance between pitching herself as a continuation of her father’s establishment-bucking progressive legacy and embracing the broad support she’s received from