MO-03 House winner?
7dBob Onder now has Donald Trump’s endorsement in the MO-03 House winner race, and his odds are at 94%.
94%
Republican
Bob Onder
Republican candidate for U.S. House in Missouri
$893.00
NOV 7, 2026
General Election
Voters choose the office holder.
Live Odds
Current prediction-market probability for the candidate, updated as market prices change.
Bob Onder is trading at 94% to win the MO-03 House winner? on prediction markets.
Candidate Overview
Key details about the candidate’s background, party, office sought and current campaign.
Current roleU.S. Representative
PartyRepublican
Political ideologyConservative Republican
Age64 years old (Jan 6, 1962)
GenderMale
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LocationMissouri
BackgroundU.S. Representative
EducationWashington University in St. Louis (B.A.)
Notable personal detailsRobert F. Onder Jr. is a Republican U.S. Representative for Missouri’s 3rd Congressional District, first sworn into Congress on January 3, 2025. He previously served in the Missouri House of Representatives (2007–2008) and the Missouri Senate (2015–2023). Onder is a physician specializing in allergy and immunology and has also worked as an attorney. He earned his M.D. from Washington University School of Medicine and his J.D. from Saint Louis University.
SourcesShowHide
history.house.govonder.house.govfec.govsenate.mo.goven.wikipedia.orgelectionline.orgmissouriindependent.comnrcc.orgmec.mo.govstanfordvotes.orgcybrhome.comcommons.wikimedia.orgk12irc.orgit.wikipedia.orgfr.wikipedia.orghouse.mo.govsos.mo.govreddit.comcongress.govpoplarbluff.orgmanufacturedhousing.orgbobondermo.comabc17news.commissourinet.comcdn.ymaws.comstlpr.orgarchive.phspectrumlocalnews.comthewellnews.compolitifact.comthemissouritimes.comrealclearenergy.orgisidewith.comnachc.orgfranchising.comivoterguide.comfacebook.comwashingtonpost.comlegistorm.comgoogle.comnewsnationnow.comkansascity.comaudacy.comsundayguardianlive.comibtimes.sglocalcandidates.orgkomu.comclerk.house.govjustfacts.votesmart.orgde.wikipedia.orgcdn.ballotpedia.orgstatic.votesmart.orgdisclosures-clerk.house.govgrassley.senate.govdocquery.fec.gov
Political Positions
LiberalConservative
Economy & Taxes
Supports lower taxes and tax cuts, has opposed proposed tax increases such as a 2019 HMO/health-insurance tax, and has promoted deregulatory measures intended to reduce costs for businesses and consumers.
Healthcare
Bob Onder opposes expansion of Medicaid under the Affordable Care Act and has led efforts in the Missouri legislature and as a candidate to block Medicaid expansion. He has also opposed health-insurance taxes and supported deregulation measures intended to reduce costs for businesses and consumers.
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Immigration & Border
Supports tightening and securing the U.S. border and emphasizes enforcement against illegal immigration while endorsing stronger border control measures. Advocates enforcement-focused policies rather than expanded legal pathways or broad regularization programs.
Abortion & Reproductive Rights
Bob Onder is a staunch opponent of abortion and has led efforts in the Missouri Legislature to enact strict abortion restrictions, including advocacy for the Missouri Stands for the Unborn Act which would ban most abortions at about eight weeks. He has described himself as a longstanding pro‑life legislator and sponsored multiple laws and regulatory measures restricting abortion access and clinic operations.
Climate & Energy
The candidate has publicly cast climate “alarmism” as politically motivated and has shared content questioning mainstream climate science; his record includes engagement with energy issues during his Missouri legislative service.
Public Safety & Guns
Supports expansive Second Amendment protections, led efforts for Constitutional Carry and the Second Amendment Preservation Act in Missouri, and pledges to continue protecting gun rights. Advocates rolling back or nullifying certain federal gun restrictions and opposes new significant firearm regulation.
Latest Candidate Updates
Recent changes in prediction-market odds, polling and campaign status.
Latest News
AINews Summary
Last updatedJul 25, 2026
Bob Onder is facing a Republican primary challenge from John Fraser in Missouri’s 3rd Congressional District. The district is heading toward the Aug. 4 primary, with the winner advancing to the November general election. The race is unfolding under a disputed congressional map, which could affect whether the districts used in the primary match the ones used in the general election.
history.house.gov+54
Campaign Fundraising
Latest report: Cycle 2026Campaign finance totals from the latest available reporting period.
Total raisedCash on hand
$1.8M
$1.3M
$889.1K
$444.6K
$0
2024
2026
LatestYear
Total raised
Cash on hand
Total spent
Burn rate
Cycle 2024
$1.8M
$150.4K
$1.6M
$67.8K
Cycle 2026
$950.3K
$471.5K
$636.3K
$33.5K
Source: FEC
New updates coming soon
We're monitoring and will update when new data impacts the race.
- Polls
- Endorsements