2026 forecast · South Carolina 4th

William Timmons is all but certain to win South Carolina's 4th District.

Courtney McClain vs William Timmons. The model has Timmons ahead by 20.4 points, winning 100 percent of 2,000 simulated elections.

Safe RModel R +20.4Updated October 22, 2026
Courtney McClain
Democrat
38.9%
112,770 projected votes
William Timmons
Republican
59.3%
171,786 projected votes
100%Timmons
0%McClain
Timmons all but certainEach square is one simulated election night, Timmons wins about 100 of 100
RatingSafe R100% chance for Timmons
Model marginR +20.4No polls in the race
80 percent rangeR +12.3 to R +28.12,000 simulations
Projected votes289,842Timmons 59.3%

The district map

Every district in the state, shaded by its rating

South Carolina districts

7 districts
Safe DLikely DLean DToss upLean RLikely RSafe R

Vote share

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

Courtney McClainDemocrat · 0% to win
38.9%
William TimmonsRepublican · 100% to win
59.3%

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

289,842 votes
CandidateVotesShare
William Timmons R171,78659.3%
Courtney McClain D112,77038.9%
Jessica Ethridge L5,2861.8%
Total289,842100%

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% McClain100% Timmons14 updates agoToday

Polling

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

The South Carolina governor polling average
30%35%40%45%50%55%AugSepOct38.9Johnson49.2Wilson
The line is the On Point average: a robust LOWESS fit through the polls, weighted by recency, sample, voter screen and pollster grade, refit three times so outliers count for lessDot size is each poll's weight todayHollow dot: a lean firm's poll as published; the filled dot is where the average counts it, after its measured lean is taken offHover or use the arrow keys to read any day
What moves the average today
Trafalgar Group (R)Oct 18 · 1,095 LV · A- · R lean, counted Wilson +12.2 in the average18%Wilson +16.0
Hart Research (D)Aug 15 · 600 RV · C+18%Wilson +8.0
National Public AffairsOct 16 · 604 LV · NR18%Wilson +10.0
On Point PollingOct 19 · 294 LV · Gold17%Wilson +8.6
FITSNews/Rick QuinnOct 3 · 638 RV · NR15%Wilson +10.1
Resonance MediaOct 3 · 638 RV · NR15%Wilson +10.0

This is the same On Point polling average as the full average page. The forecast reads the polls through its own Election Day projection, shown as the On Point average in the table below, and blends it with partisan lean and fundamentals.

Polls of the race

Full average
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
Timmons +20.4
Chance of winning
Courtney McClain0%
William Timmons100%
Simulated vote
Courtney McClain38.9%
William Timmons59.3%
Jessica Ethridge1.8%
How the model gets there
Partisan leanD +24.0
FundamentalsR +20.4
With pollsR +20.5
Early vote turnoutD +0.1
With early voteR +20.4

South Carolina 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 +29R +29Partisan leanthe state's baselineD +24.0Fundamentalsapproval, economy, candidatesR +20.4With pollsno pollsR +20.5With early voteturnout so farR +20.4
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.