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R Republican · Incumbent · U.S. House 3, Missouri · Nov 3, 2026

Bob
Onder

Republican physician-attorney Bob Onder represents Missouri's 3rd Congressional District in the U.S. House since January 2025.

Researched checked 6 d ago
sources
26
positions
11
endorsements
7
bobondermo.com ↗(opens in a new tab) X(opens in a new tab)
Opponents Bethany E Mann D+ 1 more Compare race →

Background

Bob Onder (R) is the U.S. Representative for Missouri's 3rd Congressional District, having been elected in 2024 and sworn in on January 3, 2025. 1 He is a physician and attorney who holds an M.D. from Washington University School of Medicine and a J.D. from Saint Louis University School of Law. 1 Before his congressional service, Onder opened a private practice in 1992 specializing in allergy, asthma, and clinical immunology, and practiced for more than 30 years. 1 He previously served in the Missouri House of Representatives (elected 2006) and the Missouri Senate (elected 2014), where he served two terms before being term-limited in 2022. 1 He and his wife reside in St. Charles County, Missouri. 1

At a glance

Party
Republican · Incumbent
Running for
U.S. House · District 3, Missouri
Election
Nov 3, 2026
Current office
U.S. Representative for Missouri's 3rd Congressional District
Website
bobondermo.com(opens in a new tab)

Where they stand

Each position links to the page it was drawn from. Quotes are verbatim.

Timeline

  1. Oct 8
    news
    Onder visits Moniteau County, discusses cost of living and affordability concerns

    During a visit to California, Missouri, Onder discussed concerns facing Moniteau County residents, highlighting cost of living and affordability as prominent district issues.

    Onder discusses concerns, issues during Moniteau County visit · Oct 8, 2026 (opens in a new tab)
  2. Oct 5
    endorsement
    U.S. Chamber of Commerce endorses Bob Onder for Missouri's 3rd District

    The U.S. Chamber of Commerce announced its endorsement of Onder for Missouri's 3rd Congressional District race.

    We Work for You · Oct 7, 2026 (opens in a new tab)
  3. Sep 29
    news
    General-election matchup confirmed: Onder faces Democrat Bethany Mann and Libertarian Jim Higgins under 2022 map

    Reporting confirmed that under the reinstated 2022 map, voters in the district would choose among incumbent Onder, Democrat Bethany Mann, and Libertarian Jim Higgins in a rematch of their 2024 contest.

    Familiar faces await Cole County voters after congressional map change · Sep 29, 2026 (opens in a new tab)
  4. Sep 26
    news
    Onder appears at Boone County Republican Women's Club event, criticizes Supreme Court map ruling

    Onder spoke at a Boone County Republican Women's Club event in Columbia, criticizing the Supreme Court's map decision and arguing that changing maps after the primary created confusion.

    Boone County GOP Women's event draws Onder, Martin · Oct 3, 2026 (opens in a new tab)
  5. Sep 25
    news
    U.S. Supreme Court blocks Missouri's 2025 gerrymandered map for a third time

    The U.S. Supreme Court issued an order directing lower courts not to require the 2025 map or block use of the 2022 map for the 2026 election, dealing a setback to Onder's lawsuit.

    For the third time, Supreme Court declines to allow Missouri to use ... · Sep 25, 2026 (opens in a new tab)
  6. Sep 22
    news
    Onder says appeals court protected primary voters in Missouri redistricting fight

    After the Eighth Circuit ruling, Onder publicly stated that the appeals court decision protected the rights of primary voters who voted under the 2025 map.

    Missouri Congressman Onder Says Appeals Court ... · Sep 22, 2026 (opens in a new tab)
  7. Sep 21
    news
    Eighth Circuit rules in favor of Onder and plaintiffs, backing GOP-leaning 2025 congressional map

    The Eighth Circuit Court of Appeals ruled for Onder and other plaintiffs, upholding the use of the 2025 map for the November election.

    ONDER v. Richard Von Glahn; People Not Politicians, Intervenors - Appellants (2026) | FindLaw · Sep 21, 2026 (opens in a new tab)
  8. Sep 17
    filing
    Missouri Republicans, including Onder, ask federal court to revive gerrymandered map and block referendum

    Onder joined a federal lawsuit seeking to require the state to use the 2025 congressional map in the November election and block the referendum.

    Missouri Republicans ask federal court to revive gerrymandered map, block referendum · Sep 17, 2026 (opens in a new tab)
  9. Sep 3
    news
    Missouri Supreme Court rules redistricting referendum petition valid, keeping 2022 map in effect

    The Missouri Supreme Court ruled the referendum petition on the 2025 congressional map was valid, leaving the 2022 map in effect unless voters approved the newer map.

    For the third time, Supreme Court declines to allow Missouri to use ... · Sep 25, 2026 (opens in a new tab)
  10. Aug 4
    filing
    Bob Onder wins Republican nomination in Missouri's 3rd District primary under 2025 map

    Onder won the Republican primary nomination on August 4 under the 2025 congressional map, setting up his general election campaign.

    ONDER v. Richard Von Glahn; People Not Politicians, Intervenors - Appellants (2026) | FindLaw · Sep 21, 2026 (opens in a new tab)

Endorsements

  • Ted Cruz official
    A 2026 news account reported Onder entered the race with Cruz's endorsement, but no dated primary-source announcement was located. hoodline.com
  • NRA organization
    Onder's campaign biography mentions NRA endorsement in his elections, but does not identify the specific election or provide a date; not confirmed as a 2026 endorsement. bobondermo.com
  • Eagle Forum organization
    Listed as an endorsement on an iVoterGuide candidate page, but no date or confirmation it applies to the 2026 general election was established. ivoterguide.com
  • Donald Trump official
    Trump posted 'Dr. Bob Onder has my Complete and Total Endorsement for Re-Election,' urging voters to support Onder in the August 4 primary. An earlier endorsement was also reported in November 2025. trump-archive.com · Aug 3, 2026
  • Missouri Farm Bureau PAC organization
    District trustees voted to endorse Onder for the Third District on June 22, 2026. mofb.org · Jun 22, 2026
  • Missouri Right to Life State and Federal PACs organization
    The PACs included Bob Onder on their endorsements for the August 4, 2026 primary; release dated June 15, 2026. missourilife.org · Jun 15, 2026
  • Donald Trump (earlier announcement) official
    Missouri Independent reported Trump endorsed Onder over GOP rivals in Missouri's 3rd Congressional District primary as early as November 3, 2025. missouriindependent.com · Nov 3, 2025

Campaign finance

Totals filed with the Federal Election Commission for the 2026 election cycle.

Raised
$950K
Spent
$636K
Cash on hand
$464K

As of Jul 15, 2026. Filings are periodic, so recent money may not be included yet. ↳ FEC record H8MO09146(opens in a new tab)

Sources 26

  1. [1] Onder discusses concerns, issues during Moniteau County visit(opens in a new tab) Oct 8, 2026
  2. [2] We Work for You(opens in a new tab) Oct 7, 2026
  3. [3] Boone County GOP Women's event draws Onder, Martin(opens in a new tab) Oct 3, 2026
  4. [4] Familiar faces await Cole County voters after congressional map change(opens in a new tab) Sep 29, 2026
  5. [5] About Dr. Onder(opens in a new tab) Sep 25, 2026
  6. [6] For the third time, Supreme Court declines to allow Missouri to use ...(opens in a new tab) Sep 25, 2026
  7. [7] Missouri Congressman Onder Says Appeals Court ...(opens in a new tab) Sep 22, 2026
  8. [8] ONDER v. Richard Von Glahn; People Not Politicians, Intervenors - Appellants (2026) | FindLaw(opens in a new tab) Sep 21, 2026
  9. [9] Bob Onder(opens in a new tab) Sep 17, 2026
  10. [10] Missouri Republicans ask federal court to revive gerrymandered map, block referendum(opens in a new tab) Sep 17, 2026
  11. [11] Congressman Bob Onder is a MAGA Warrior who is doing a fantastic job…(opens in a new tab) Aug 6, 2026
  12. [12] Bob Onder Wins Missouri 3rd District GOP Primary(opens in a new tab) Aug 5, 2026
  13. [13] Press Release(opens in a new tab) Jul 24, 2026
  14. [14] How did Missouri and Kansas politicians vote on housing bill Trump won’t sign?(opens in a new tab) Jul 10, 2026
  15. [15] Rep. Onder Newsletter: Happy July 4!(opens in a new tab) Jul 7, 2026
  16. [16] Bob Onder endorsed by Missouri Farm Bureau PAC(opens in a new tab) Jun 22, 2026
  17. [17] Rep. Onder Newsletter: Why We Need the SAVE America Act(opens in a new tab) Mar 16, 2026
  18. [18] Rep. Onder Introduces the Curtailing Agency Reach and ...(opens in a new tab) Feb 17, 2026
  19. [19] Donald Trump endorses Bob Onder over GOP rivals in Missouri's 3rd Congressional District primary • Missouri Independent(opens in a new tab) Nov 3, 2025
  20. [20] Congressman Bob Onder Applauds Passage of the “One Big Beautiful ...(opens in a new tab) Jul 7, 2025
  21. [21] 2nd Amendment(opens in a new tab) Jan 27, 2025
  22. [22] Immigration(opens in a new tab) Jan 27, 2025
  23. [23] Pro-Life | Representative Bob Onder(opens in a new tab) Jan 27, 2025
  24. [24] Education(opens in a new tab) Jan 3, 2025
  25. [25] Votes and Legislation | Representative Bob Onder(opens in a new tab) Jan 3, 2025
  26. [26] Health | Representative Bob Onder(opens in a new tab) Dec 6, 2024
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