Adelita Grijalva, a former local elected official, will follow in her father’s footsteps, representing a congressional district in southern Arizona after fending off a challenge built around generational change and winning the Democratic primary in a special election on Tuesday night.

The next test of who Democratic voters want to see leading the party will take place Tuesday in southwest Arizona, where three leading candidates are offering competing visions in the primary to fill the late Rep.

Southern Arizona voters are selecting a successor to one of the most senior and progressive power brokers on Capitol Hill, whose seat is up for grabs for the first time in over two decades.

Adelita Grijalva is the front-runner to replace her father in Congress but faces an unexpectedly competitive primary featuring a young social-media-savvy newcomer.

Adelita Grijalva is a veteran of both Tucson’s school board and the Pima County Board of Supervisors. She’s also the 54-year-old daughter of the progressive icon Rep. Raúl Grijalva, whose death in March kicked off the special election for his U.S. House seat in Arizona that she is now favored to win.

Arizona Democrats on Tuesday will choose their nominee to run for a vacant U.S. House seat in September, as the party grapples with demands for generational change and divisions over just how progressive it can be in the era of President Donald Trump.