About half of Missouri’s 34 state Senate seats and all 163 state House seats are up for election in 2026. The Associated Press will provide vote results and declare winners in contested primaries for U.S. House, state auditor, state Senate and state House, as well as in four statewide ballot measures. About 586,000 Republican primary votes and about 322,000 Democratic primary votes were cast in the 2022 primaries for state auditor. About 12% of the vote in the 2024 state primary was cast early in person or by mail. In the 2024 state primaries, the AP first reported results at 8:06 p.m.