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.

For more than two decades, much of Southern Arizona was represented by Rep. Raúl M. Grijalva, a liberal stalwart who championed environmental causes, supported immigrant rights and advocated on behalf of indigenous communities.

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.