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.

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.

Voters are heading to the polls in Arizona’s 7th Congressional District on Tuesday to choose their primary picks to succeed the late Rep. Raúl Grijalva (D-Ariz.), who died in March. Five

Democrat Deja Foxx, 25, is gaining ground in the special Democratic primary in Arizona’s 7th District as she challenges a Democrat dynasty. NBC News’ Vaughn Hillyard spoke with Foxx on the campaign trail.

Progressive activist Deja Foxx, 25, campaigns for Arizona congressional seat with support from David Hogg, drawing comparisons to Zohran Mamdani's victory against former Gov. Andrew Cuomo.

The July 11 ruling overturns a previous ruling that prevented candidates other than those selected by the party from running under the party's banner.

Conventional wisdom says Arizona Democrats will elect another Grijalva in CD7. But if they go with a young upstart they could rock the party.