Bob Onder
MO-03 Republican nominee?
$14.2K
AUG 5, 2026Primary Election
Party selects its nominee.
Overview
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.
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Positions
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.
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