Horizon · our Election Day forecast: polls, plus fundamentals like incumbency, fundraising and past results.

Pulse · polls only: where the races stand today, with no fundamentals and wider uncertainty.

What's the difference?

South Carolina › U.S. House of Representatives · November 3, 2026 · Updated Oct 16, 2026

South Carolina's 3rd District

Biggs is very likely to win: Biggs wins in more than 99 of every 100 simulations.

Lehmacher (D)
<1%
chance of winning
Biggs (R)
>99%
Average margin
R+34.7
80% of outcomes
R+44 to R+26
Partisan lean
R+42
Polls
No pollsmodel only

Biggs is very likely to win: Biggs wins in more than 99 of every 100 simulations.

Lehmacher (D)
<1%
chance of winning
Biggs (R)
>99%
Average margin
R+35.3
80% of outcomes
R+47 to R+24
Partisan lean
R+42
Polls
No pollsmodel only

Range of outcomes

Final margin across our simulations; the white dashes mark the middle 80%.

R+34.7R+40R+20EvenD+20D+40
R+35.3R+60R+40R+20EvenD+20D+40D+60

How the odds have moved

Chance of winning by forecast date.

0%25%50%75%100%AugSepOctNovNov 3Lehmacher <1%Biggs >99%

Updated nightly. Each day is the current model run on the polls that had ended by then (how).

0%25%50%75%100%AugSepOctNovNov 3Lehmacher <1%Biggs >99%

Updated nightly. Each day is the current model run on the polls that had ended by then (how).

The candidates

Democratic

Eunice Lehmacher

Social worker and nominee for state representative in 2020 and 2024

Experience
No elected office
Raised
$92.9K
From individuals
$88.6K
Spent
$43.4K
Cash on hand
$49.6K

Money: FEC, through Sep 30, 2026.

Profile and career

RepublicanIncumbent

Sheri Biggs

Incumbent U.S. representative

Experience
Statewide office or Congress
Raised
$692.5K
From individuals
$113.1K
Spent
$537.2K
Cash on hand
$259.3K

Money: FEC, through Sep 30, 2026.

Profile and career · Wikipedia

What goes into the forecast

Every ingredient's estimate of the final margin.

National environment
D+9.5Election Day forecast; federal races run in it
Swing reaching this office
78%Of a shift in the environment, from past House races since 2016
Southeast adjustment
−1.9How House races in the region have run against lean and environment lately
← RepublicanDemocratic →Lean + environmentUsual vote, shifted by 78% of the environment andthe Southeast adjustmentR+35.8Fundamentals modelAdds incumbency, past results, money andexperienceR+34.8Polls in similar placesPolling of similar races in South Carolina andlook-alike placesR+34.4Polling averageNo polls of this racenot availableHorizon forecastPolls + fundamentals, projected to Election DayR+34.7Pulse forecastPolls (and polling of similar places) only, todayR+35.3

Each estimate is a margin before national and statewide uncertainty is simulated. Horizon blends polls, fundamentals and a little of the similar-places estimate, weighting each by how precise it is; Pulse uses polls and similar places only.

Fundamentals inputs
Incumbency (+1 D, −1 R)-1
Fundraising edge (log ratio of individual money)-2.04
Elected-experience edge-1
First-term incumbent-1
Seat's last result vs. expectation-3.06
Incumbent's last result vs. expectation-3.06

Polls

No public polls of this race. The forecast relies on fundamentals and on polling of similar places.

The district

Lean R+42: how much more Democratic or Republican than the nation it votes for president.

Presidential vote

← RepublicanDemocratic →2016 presidentR+40.8R+43.0 vs. nation2020 presidentR+37.9R+42.5 vs. nation2024 presidentR+43.6R+42.1 vs. nation

Precinct results re-aggregated to the current district lines.

Who lives here

Population
766,095
People per km²
51
Adults with a B.A.+
26%
White, no degree
52%of adults
  • White 71%
  • Hispanic 7%
  • Black 17%
  • Asian 1%
  • Other / multiracial 5%

American Community Survey 2020–2024, aggregated from census tracts.

Past results

Results in the same-numbered district; earlier elections may have used different lines.

2024

346,713 votes · R+47.8
✓ Sheri Biggs (R)71.7%
Bryon L. Best (D)25.3%
Mike Bedenbaugh (OTH)2.9%

2024 President Vote in this district

350,868 two-party votes · R+43.6 · R+42.1 vs. the nation
✓ Donald Trump (R)71.8%
Kamala Harris (D)28.2%

2022

195,427 votes · Uncontested by the other party
✓ Jeff Dan (R)97.6%
Write-In (—)2.4%

2020 Earlier district lines

333,564 votes · R+42.6
✓ Jeff Duncan (R)71.2%
Hosea Cleveland (D)28.7%

2020 President Vote in this district

345,998 two-party votes · R+37.9 · R+42.5 vs. the nation
✓ Donald Trump (R)69.0%
Joe Biden (D)31.0%

2018 Earlier district lines

226,204 votes · R+37.3
✓ Jeff Duncan (R)67.8%
Mary Geren (D)31.0%
Dave Moore (OTH)1.2%

2016 Earlier district lines

272,481 votes · R+45.8
✓ Jeff Duncan (R)72.8%
Hosea Cleveland (D)27.1%

2016 President Vote in this district

369,593 two-party votes · R+40.8 · R+43.0 vs. the nation
✓ Donald Trump (R)70.4%
Hillary Clinton (D)29.6%