Ed Case, the incumbent moderate Democrat, defeated Jarrett Keohokalole, a younger progressive challenger, in Hawaii's congressional primary. The race highlighted a generational divide within the state's Democratic Party, pitting Case's establishment experience against Keohokalole's push for more aggressive action on the islands' skyrocketing cost of living.

Case, who has held the seat since 2019 and previously served in the 2000s, campaigned on his seniority and pragmatic approach to federal funding for Hawaii. Keohokalole, a state senator, argued that the delegation needed fresh energy to tackle the housing crisis and economic pressures driving residents to the mainland.

The outcome suggests Hawaii voters in the 1st Congressional District favored continuity and institutional knowledge over generational turnover. Case will now advance to the general election in the heavily Democratic district, where he is heavily favored to retain his House seat.