Member brief No. MO-03
Reviewed October 31, 2026
MO-03 · Missouri
Robert F. Onder, Jr.
Republican. Trump won Missouri in 2024. Not flagged for 2032 redistricting risk.
- Age on Election Day 2028
- 66
- Born January 6, 1962.
- Lean
- R+13
- Solidly Republican. Cook PVI, 2026 lines.
- In the House since
- 2025
- Served since January 3, 2025.
- Cash on hand
- $526K
- $525,828. Reporting period ended October 14, 2026
The 2026 race
- November 3, 2026
- Re-elected
Over Bethany Mann (D). Called by NBC News on November 4, 2026.
- Primary
- Won with 66.3%
Aug. 4. Next: John G Fraser, 33.7%.
Also on the November ballot: Jim Higgins (Libertarian).
Endorsements, 2026
Endorsed: Donald Trump.
None on record: Club for Growth, Turning Point Action, MAHA PAC.
What a race here costs
TV: Saint Louis, 1.27 million homes. The district is 13.8% of the market; 3 markets in all.
2026 primary: $530K spent, $5.26 a vote
2024 general: $412K spent, $1.05 a vote
In the House, 119th Congress
Committees: Education and Workforce · Judiciary · Transportation and Infrastructure
General-election outcomes
- 2024 vote share
- 61.31%
- Victory margin
- +26.01 pts
- Trump, 2024
- 62.66% · +26.72 pts
Margin 0.71 points below Trump. Vote share 1.35 points below.
2024 election districts. Valid votes; margin over the runner-up. Runner-up: Bethany E. Mann. Returns · Trump baseline · Method. Reviewed November 5, 2026.
Money, past cycles
| Cycle | Raised | From individuals | Cash at year end |
|---|---|---|---|
| 2024 | $1.8M | 37% | $150K |
Scorecards and grades
- Conservative average, out of 100
- 94.8
- Progressive average, out of 100
- 7.2 (LCV 0, Progressive Punch 2, Stop Corruption Now 20)
- IAP Action score, immigration
- 124, rank 73 of 431
- Gun Owners of America grade, 2024
- A
Read October 4, 2026 from the member’s page on heritageaction.com, clubforgrowth.org, tpaction.com, gopscorecard.limitedgov.org.