Primary elections held across multiple states on June 2–3, 2026 produced a mixed slate of results that will define the competitive landscape heading into the November midterms. In Iowa, Republican Rep. Ashley Hinson secured her party's Senate nomination, while Trump-endorsed candidate Randy Feenstra fell short in his bid, raising questions about the reliability of the former president's endorsement record in down-ballot races.

The Iowa results also included a closely watched contest between Josh Turek and Zach Lahn, adding further drama to a state that has emerged as a key battleground for Senate control. Hinson's victory was called early and positions her as the Republican candidate in what is expected to be a competitive general election race.

In California, voters advanced candidates in a high-profile gubernatorial primary, with the Associated Press tracking results that will determine who competes in the fall. California's top-two primary system means candidates from the same party can advance, and the outcome is expected to set up a closely watched general election contest in the nation's most populous state.

Across the broader primary map, Democrats and Republicans alike were choosing their standard-bearers in races that will help determine control of Congress. Analysts on both sides of the aisle noted that results would test the strength of Trump's political influence ahead of the midterms, particularly after Feenstra's loss complicated the narrative of presidential endorsement power.

The Washington Examiner highlighted Feenstra's defeat as a meaningful blow to Trump-backed candidates' overall success rate, while other outlets noted that Hinson's win demonstrated independent candidate strength within the Republican Party. Democratic primary winners were also being tracked closely, as the party works to field competitive candidates in districts that could shift the House majority.