The House · MO-03
Projected turnout: 278,950 votes · model estimate, not counted votes.
Displayed shares include the model's Other-vote allowance and therefore add to 100%. Interval endpoints are the model's 10th and 90th percentiles, not a polling margin of error.
SURE — · not yet rateable
How reliable is the evidence behind this race's number — not who wins. A safe seat with no polls can score low while its forecast is easy.
No public poll of this race has been fielded yet. SURE rates poll evidence, so it has nothing to rate here — this is an absence of evidence, not a judgement that the evidence is weak.
Limited evidence: zero polls. The fitted race-error distribution widens automatically; no manual score penalty or race override is applied.
| Effective poll evidence | 0.00 |
|---|---|
| Race-specific error SD | 4.0 points |
| Historically calibrated 80% half-range | ±5.7 |
| Model treatment | provisional widen-only chamber fallback |
| ✓ Fundamentals✓ Environment✗ Polls✗ Money (FEC)◐ Roster settled | |
SURE v3 — historically calibrated evidence-conditioned uncertainty · generated 2026-07-27. SURE rates the EVIDENCE behind a race's number, not the outcome: a safe seat with no polls can score low while its forecast is easy. Never a second win probability. It changes only idiosyncratic uncertainty, never the center. Senate marginal intervals are historically calibrated under the stated 0-120 day assumptions; House/Governor conditioning is provisional and widen-only until chamber-specific history passes the same gates.
County map
Counties colored by the projected margin — the 2024 result shifted by the state's projected swing, summing exactly to the forecast above. Hover a county for its numbers.
County by county
| County | Margin | Bethany E. Mann | Bob Onder | Total |
|---|---|---|---|---|
| St. Charles | R+11.6 | 67,513 | 85,487 | 155,015 |
| Boone | D+26.7 | 30,206 | 17,358 | 48,190 |
| Lincoln | R+50.5 | 5,330 | 16,488 | 22,105 |
| Callaway | R+38.3 | 4,440 | 10,071 | 14,702 |
| Warren | R+43.6 | 3,811 | 9,843 | 13,834 |
| Audrain | R+43.1 | 2,010 | 5,122 | 7,226 |
| Pike | R+52.1 | 1,259 | 4,076 | 5,405 |
| Montgomery | R+54.7 | 909 | 3,174 | 4,137 |
| Ralls | R+54.0 | 891 | 3,042 | 3,985 |
| Monroe | R+54.7 | 664 | 2,311 | 3,014 |
| Franklin | R+45.8 | 211 | 577 | 798 |
| St. Louis | D+14.0 | 304 | 229 | 540 |
Projected — each county's share of THIS district only (split counties count just the votes inside the lines), summing to the forecast above.
State of the race
Call the Map currently has Onder ahead of Mann by R+14.4, with a 99 in 100 chance to win. The seat is currently held by a Republican. That result would keep the seat with Republicans. No current nominee-matched poll average is available, so the forecast is leaning on the non-polling evidence shown below.
- CTM forecast
- Solid R hold · 99 in 100
- Seat
- Rep.-held · projected hold
- Forecast range
- R+22.1 to R+6.7
How the race is moving
99%R win probability today
Since the Jul 21 edition: margin 0.9 pts toward R · win probability unchanged
Tracked editions only. The pale segment marks the time remaining to Election Day; it is not fabricated future data. Hover, tap, or focus a chart and use the arrow keys for each edition's exact values.
How the margin was built
6 contributions, summing to the forecast R+14.4. Every model adjustment is published here — including candidate-quality shifts. Read how the whole margin is built →
TWIN neighbours
TWIN means Typology-Weighted Inference from Neighbors, Call the Map’s comparable-unit matching engine for any kind of race. It borrows poll residuals only—never centers, terrain, or outcomes. Similarity is demographic and behavioural, not geographic, and each contribution decays with similarity distance. Borrowed evidence always has lower precision than a race’s own polling.
| Race | Role | Similarity | Residual contributed | Direction |
|---|---|---|---|---|
| IA-02 | Lender (polled) | 0.780 | +9.500 pts | toward D |
| WI-08 | Fellow recipient | 0.768 | ±0.000 pts | none |
| KY-04 | Fellow recipient | 0.760 | ±0.000 pts | none |
| IA-01 | Fellow recipient | 0.739 | ±0.000 pts | none |
| IN-04 | Fellow recipient | 0.738 | ±0.000 pts | none |
| MO-06 | Fellow recipient | 0.724 | ±0.000 pts | none |
| MI-07 | Fellow recipient | 0.719 | ±0.000 pts | none |
| WI-06 | Lender (polled) | 0.716 | −7.200 pts | toward R |
| MN-01 | Lender (polled) | 0.712 | +3.600 pts | toward D |
| IN-09 | Fellow recipient | 0.709 | ±0.000 pts | none |
Signals at a glance
- CTM Partisan Lean Index
- R+20.0
- Historical match quality
- 84/100 — How closely this race matches its eight historical analogues; not a win probability.
Recent polling
No polls yet for this race — the forecast rests on fundamentals only (partisan lean, fundraising, incumbency).