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NewsWPLG Local 10 – Main FeedAugust 3, 2026Miami-Dade

Missouri primary election overview: U.S. House races and constitutional ballot measures

Missouri voters are participating in primary elections for U.S. House seats and deciding on four statewide ballot measures, including proposals to change constitutional amendment requirements and state tax structures. Polls close at 7 p.m. CT, and results will determine candidates for the November general election.

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Why It Matters

The outcome of these primaries and ballot measures will determine the candidates for federal and state offices and potentially alter the state's process and tax code.

Key Facts

  • Polls close at 7 p.m. CT (8 p.m. ET).
  • Amendment 4 proposes requiring a majority vote in each congressional district to pass voter-initiated constitutional amendments, replacing the current simple statewide majority requirement.
  • Amendment 5 proposes phasing out individual state income taxes and expanding sales taxes.
  • Missouri has 4.4 million registered voters as of the 2024 general election.
  • Candidates for federal, judicial, and state offices may request a recount if the margin is less than 0.5%.
  • Candidates for local offices may request a recount if the margin is less than 1%.
  • Missouri does not have automatic recounts.
  • The state began allowing no-excuse early voting in the 2022 general election.
  • Approximately 12% of the vote in the 2024 state primary was cast early or by mail.
  • The AP declares winners only when it is mathematically impossible for a trailing candidate to close the gap.

Who's Mentioned

personKamala Harris“Former Vice President and 2024 presidential candidate”personCori Bush“Former U.S. Representative challenging Wesley Bell”personWesley Bell“Incumbent Democratic U.S. Representative for the 1st District”organizationAIPAC“Political organization involved in campaign spending”personEmanuel Cleaver“Democratic U.S. Representative running for a 12th term”personDonald Trump“Former President who backed the new congressional map”