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Missouri's 2025 Congressional Map: Legal Battle Continues (2026)
Topic: Missouri’s 2025 congressional map and ongoing legal challenge.
Updated Oct 16, 2026, 2:28 PM ET
Republican · 3 November 2026
Bob Onder
U.S. Representative for Missouri's 3rd congressional district (since 2025)
Bob Onder, a Republican physician and attorney who has represented Missouri's 3rd congressional district since 2025 after eight years in the Missouri Senate, seeks reelection in 2026 against Democrat Bethany Mann.
2026 Races & Market Forecast
Live TruthIndex™ and prediction market consensus for races contested by Bob Onder.
Latest coverage
Live News
Recent media coverage for Bob Onder.
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Missouri Democrats aim to break Republicans’ streak of House supermajorities
The piece discusses Missouri’s ongoing political battleground as Democrats aim to snap Republicans’ streak of seven straight House supermajorities, needing just three seats to break the pattern.
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Missouri House District 130 candidates weigh in on a variety of topics
Topic: Candidates for Missouri House District 130 discuss policy topics in a 2026 Informed Voter Coalition interview.
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Missouri Voters Could Kill a Gerrymander: And Make It Harder for Politicians to Try Again
The article discusses Missouri voter initiatives Prop. A and Amendment 6 shaping redistricting and referendum power, with potential impact on future maps, including the Missouri-03 district represented by Bob Onder.
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Oct 15, 2026 Public Hearing: Jefferson, MO | Missouri
The Missouri document concerns Proposition A, a proposed congressional redistricting plan for the November 3, 2026 General Election ballot.
No story this week names this candidate.
- Born
- January 6, 1962
- Birthplace
- St. Louis, Missouri
- Education
- St. Louis University High School (1980)
Washington University in St. Louis (degree in economics)
Washington University School of Medicine
Saint Louis University School of Law
Biography & Campaign Analysis
Background
Bob Onder, born Robert Frank Onder Jr. on January 6, 1962, graduated from St. Louis University High School in 1980. He earned an economics degree summa cum laude from Washington University in St. Louis and then graduated from the Washington University School of Medicine, practicing as a physician specializing in allergy and asthma care. He later graduated from Saint Louis University School of Law. Onder and his wife, Allison, have six children, and he is Roman Catholic.
Career
Onder was elected to the Missouri House of Representatives in 2006 and served a single term from 2007 to 2008, during which he sponsored HB 1549, an immigration bill signed into law by Governor Matt Blunt.
In 2008 he ran for the open 9th congressional district seat and lost the Republican primary to Blaine Luetkemeyer. He returned to office in 2014, winning the Republican primary for the 2nd district of the Missouri Senate, and represented the St. Charles area from 2015 to 2023.
In the Senate he was elected Assistant Majority Floor Leader in his first year, became chairman of the General Laws Committee in 2017 and was a founding member of the chamber's Conservative Caucus.
Onder withdrew from the 2022 race for St. Charles County Executive and later left a 2024 bid for lieutenant governor, switching to the 3rd congressional district after Luetkemeyer announced he would not run for reelection.
He defeated six opponents for the Republican nomination and then beat Democrat Bethany Mann in the general election, taking office in 2025. In the 119th Congress he sits on the Committee on Education and Workforce, the Committee on the Judiciary and the Committee on Transportation and Infrastructure.
2026 race
Bob Onder is seeking a second term in the 3rd district, which encompasses all of St. Charles County and reaches west to most of Columbia and north to Mexico and part of Hannibal.
He won the Republican primary with 66.3% of the vote against John G. Fraser, an accountant and former advisor to local government.
In the general election on November 3, 2026, he faces a rematch with Democrat Bethany Mann, a technology specialist who was also the party's nominee in 2022 and 2024, and Libertarian Jim Higgins.