Most Arizona legislative incumbents advanced out of last week’s primary, but a handful of Democrats lost to challengers from their left, and a new mail‑ballot drop‑off option that promises faster counts drew thousands of users, according to separate reports from the Arizona Capitol Times and the Arizona Mirror.

The tightest and most consequential loss came in Tucson’s Legislative District 21. Rep. Stephanie Stahl Hamilton, a three‑term Democrat and the ranking member on House Appropriations, conceded after finishing third in a four‑way primary for two House nominations. Unofficial results show Rep. Consuelo Hernandez led with just under 30% of the vote, while Miranda Lopez, identified by the Capitol Times as a Democratic Socialist and former Pima County Democratic Party executive director, posted 25.34% to Stahl Hamilton’s 24.51%, a margin just under 1 percentage point and outside Arizona’s automatic half‑percentage‑point recount trigger.

The policy consequence arrives quickly if counties certify results as reported. Stahl Hamilton helped craft two bipartisan budgets and played a key role in the 2024 repeal of the territorial‑era abortion ban, per the Capitol Times. Losing a budget negotiator with a recent record of cross‑aisle deal‑making narrows Democrats’ bench of experienced appropriators and could complicate bipartisan talks next session, especially in a narrowly divided Capitol where a few votes can swing outcomes.

LD21 also surfaced open intraparty conflict. The Arizona Working Families Party described Stahl Hamilton and Lopez as “champions” of its progressive agenda. Lopez wrote an open letter to district voters saying she ran against Hernandez because Hernandez’s campaign accepted corporate money and voted with Republicans more often than other Democrats. Hernandez, who finished first, responded on X: “Congratulations to the DSA Tucson who are celebrating a win for Lopez by beating a long-time progressive democrat in the Democratic caucus. Way to go! I hope the DSA stops going after Democrats and focuses on being in the majority. I will be watching who helps.” The two now appear likely to be House seatmates in this Democratic‑leaning district, the Capitol Times reported.

Progressives notched a clearer win in Phoenix’s Legislative District 24, where Democratic challengers Alberto Flores and Lisbeth Arescurenaga easily defeated incumbent Rep. Lydia Hernandez, according to the Capitol Times. Hernandez took about 14% and trailed both winners by more than 20 points; her running mate Rosa Cantu finished fourth at nearly 9%. Flores and Arescurenaga ran with Sen. Analise Ortiz, and local Democratic precinct committee members had previously censured Hernandez for not representing “Democratic values,” the paper reported. Democrats like Ortiz have accused Hernandez of siding too often with Republicans, citing her opposition to a Democratic amendment to prohibit federal immigration officers from wearing masks in Arizona. Hernandez did not respond to a request for comment before Thursday afternoon, per the Capitol Times.