Five states held primary elections on Tuesday, August 4, 2026, in contests that could determine which party controls Congress after the midterm elections, NPR reported on August 5.

NPR's report, filed by Tamara Keith and Steve Inskeep for the network's Morning Edition program, covered results from all five states and flagged at least one race as too close to call. The report did not say which specific race was undecided.

The primaries spanned states with different election systems. Washington holds its primary on the first Tuesday of August by state law, per the Washington Secretary of State's elections office. Michigan's Secretary of State posted August 4 primary results on its elections website. Missouri's Secretary of State set the candidate filing period for the August 4 primary as February 24 through March 31, 2026. Kent County, Michigan, published unofficial results for the same primary.

Michigan's turnout data offers a partial look at voter engagement. More than one million Michigan voters cast ballots before the August 4 primary, according to the Michigan Secretary of State, a turnout rate of 16.5% of the state's active registered voters. That figure, released the day before Election Day, reflects pre-election-day voting and does not include same-day participation.

The California references in the broader election context stem from that state's earlier statewide direct primary. Los Angeles County announced that voting for the 2026 California statewide direct primary began May 23, 2026. The Orange County Registrar of Voters processed all ballots from that contest and certified the results. California's primary is separate from the August 4 contests and serves here as a reference point for the 2026 primary calendar rather than a same-day event.

The August 4 primaries carry weight beyond their immediate results because the nominees they produce will compete in November for seats that determine the partisan balance in Congress. With control of both chambers potentially in play, primary outcomes in these five states will shape general election matchups, candidate quality, and party resources allocated through the fall.

Several structural details frame how these results are being reported and certified. Washington's Secretary of State maintains a state election results archive on its elections website. Michigan's county-level reporting, as seen in Kent County's unofficial results, typically comes before official certification by the state board of canvassers. Missouri's filing window, closing in late March, set the candidate field months ahead of the primary.

The broader context here is that midterm primaries in August fall in a narrow window where results can influence national party strategy going into the fall campaign. A race too close to call at this stage means the nominee, and in some cases the competitive nature of the general election, stays unresolved until final tallies are done. For party committees and independent expenditure groups — organizations that spend money on elections without coordinating directly with campaigns — that uncertainty complicates decisions about where to direct resources in the final stretch before November.

NPR's designation of a race as too close to call, without further detail in the published report, leaves open which contest is affected. Readers tracking these primaries will need to watch state election offices, including the Michigan Secretary of State's results page and the Washington Secretary of State's archive, for updated tallies.

The November general election will determine whether the current partisan composition of Congress holds or shifts, and the nominees emerging from these five August primaries will be central to that outcome.