2026 forecast · Missouri 3rd

Bob Onder is all but certain to win Missouri's 3rd District.

Bethany Mann vs Bob Onder. The model has Onder ahead by 21.0 points, winning 100 percent of 2,000 simulated elections.

Safe RModel R +21.0Updated October 22, 2026
Bethany Mann
Democrat
38.6%
91,557 projected votes
Bob Onder
Republican
59.6%
141,433 projected votes
100%Onder
0%Mann
Onder all but certainEach square is one simulated election night, Onder wins about 100 of 100
RatingSafe R100% chance for Onder
Model marginR +21.0No polls in the race
80 percent rangeR +13.0 to R +28.72,000 simulations
Projected votes237,330Onder 59.6%

The district map

Every district in the state, shaded by its rating

Missouri districts

8 districts
Safe DLikely DLean DToss upLean RLikely RSafe R

Vote share

Each candidate's projected share and the range of 80 percent of simulations

Bethany MannDemocrat · 0% to win
38.6%
Bob OnderRepublican · 100% to win
59.6%

Scale runs from 25 to 75 percent. The dot is the forecast, the band is the 80 percent range and the brighter tick marks 50 percent.

Projected district vote

237,330 votes
CandidateVotesShare
Bob Onder R141,43359.6%
Bethany Mann D91,55738.6%
Jim Higgins L4,3401.8%
Total237,330100%

Each candidate's expected vote in the On Point simulation, at the forecast's projected turnout.

The trend

Each side's chance of winning over the forecast's recent updates

0%25%50%75%100%0% Mann100% Onder16 updates agoToday

Polling

Every poll in the average, and how the model reads it

Polls of the race

PollsterSampleAgeMargin
On Point averageWeighted averageNo polls

Each margin is the poll as the pollster published it. The forecast counts every poll after its house effect and the undecided split, which is what the trail above shows; hover a margin for the counted value. Lean R and Lean D mark partisan leaning firms.

Model margin
Onder +21.0
Chance of winning
Bethany Mann0%
Bob Onder100%
Simulated vote
Bethany Mann38.6%
Bob Onder59.6%
Jim Higgins1.8%
How the model gets there
Partisan leanD +26.0
FundamentalsR +20.9
With pollsR +21.2
Early vote turnoutD +0.2
With early voteR +21.0

Missouri has no early vote reported yet, so its turnout correction comes from similar states that do and from its primary turnout. Early vote tracker

How we got here

From the state's partisan lean to the forecast, one stage at a time

D +31R +31Partisan leanthe state's baselineD +26.0Fundamentalsapproval, economy, candidatesR +20.9With pollsno pollsR +21.2With early voteturnout so farR +21.0
Methodology
Every county is rebuilt by simulating voters going to the polls, 2,000 times, from On Point Polling survey data, past results, and the polling average. How the model works.