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 (BS)
Notable personal detailsRobert Frank Onder Jr. is an American politician, physician, and attorney who has represented Missouri’s 3rd congressional district in the U.S. House since January 3, 2025. He previously served in the Missouri House of Representatives and later the Missouri State Senate, where he was assistant majority floor leader. He earned an M.D. from Washington University School of Medicine in St. Louis and a J.D. from Saint Louis University School of Law, and he has operated a private medical practice specializing in allergy, asthma, and clinical immunology.
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Positions
Economy & Taxes
Bob Onder supports cutting taxes and reducing regulatory burdens on business, and has opposed new taxes such as a proposed health insurance tax. He has sponsored legislation aimed at lowering income taxes and has aligned with tax-cut advocacy groups calling to extend federal tax cuts.
Healthcare
Opposes Medicaid expansion under the Affordable Care Act and has worked to block funding and implementation of expansion in Missouri; has characterized the expansion as part of "Obamacare" and opposed it on cost and policy grounds.
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Immigration & Border
Supports tightening the southern border and asylum process and favors stronger enforcement to reduce illegal immigration. Describes current immigration flows as an "invasion" and calls for returning to Trump-era border policies.
Abortion & Reproductive Rights
The candidate supports significant restrictions on abortion and has sponsored and authored multiple bills tightening regulations on abortion providers and restricting abortion access, including provisions that contributed to Missouri’s near-total ban following the overturning of Roe v. Wade. He has been endorsed by anti‑abortion groups and described as a staunch opponent of abortion.
Climate & Energy
Supports increasing domestic oil production and rolling back regulations while emphasizing market-driven economic policies; has served on state legislative committees related to energy and the environment. Positions favor fossil-fuel production and regulatory rollback rather than aggressive emissions mandates.
Public Safety & Guns
Supports the Second Amendment and policies that expand or protect lawful gun ownership; has advocated for expanded concealed-carry permissions and says he will fight on behalf of gun owners. Positions emphasize defending gun rights while working on public-safety measures rather than supporting broad new restrictions.
Fundraising
Latest report: Cycle 20262024
2026
LatestCycle 2024
Cycle 2026
Source: FEC
New updates coming soon
We're monitoring and will update when new data impacts the race.
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