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Race · U.S. Senate · South Carolina · 2026

South Carolina · U.S. Senate · 2026

Seat U.S. Senate, Class 2

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U.S. Senate, Class 2 · Incumbent running
CONOn the ballot
Mark Hackett
—Not published for this candidate
DEMNominee
Annie Andrews
20%Hume Outlook · Hume model estimate · as of 2026-10-28
LIBOn the ballot
Kasie Whitener
—Not published for this candidate
REPNominee
Darline Graham incumbent
80%Hume Outlook · Hume model estimate · as of 2026-10-28
IncumbentDarline Graham

Hume Outlook

hume-2026.10-r1 · Forecast as of Oct 28, 2026
80% Darline Graham · RepublicanChance to win, between the two named candidates
REP Darline Graham 80%
DEM Annie Andrews 20%
  • Hume model estimate · built on polls, fundamentals, and markets
Latest poll Graham 47.0% · Andrews 46.0% · Whitener 2.0% · Hackett 1.0% Targoz Market Research / South Carolina Policy Council · 2026-10-25
Seat lean (Hume PVI) R+8 cycles 2020, 2024
Prior result, this seat REP 54.5% 2020 general · margin 10.3%

Side by side

4 candidates · 5 measures
FEC summary through 2026-10-14
MeasureCONHackettDEMAndrewsLIBWhitenerREPGraham
Total receiptsUSD, cycle to date, all authorized committees
Mark HackettNot available No FEC summary is available for this candidate.
Annie Andrews$24,216,840.67
Kasie Whitener$27,614.81
Darline Graham$1,917,646.09
Total disbursementsUSD, cycle to date
Mark HackettNot available No FEC summary is available for this candidate.
Annie Andrews$22,507,375.14
Kasie Whitener$21,833.35
Darline Graham$1,283,216.19
Cash on handUSD, close of the covered period
Mark HackettNot available No FEC summary is available for this candidate.
Annie Andrews$1,709,465.53
Kasie Whitener$5,781.46
Darline Graham$634,429.90
Latest pollpercent, as stored
Mark Hackett1.0%Targoz Market Research · 2026-10-25
Annie Andrews46.0%Targoz Market Research · 2026-10-25
Kasie Whitener2.0%Targoz Market Research · 2026-10-25
Darline Graham47.0%Targoz Market Research · 2026-10-25
Seat lean (Hume PVI)identical for every candidate
Mark HackettR+8seat-level
Annie AndrewsR+8seat-level
Kasie WhitenerR+8seat-level
Darline GrahamR+8seat-level
Money is each candidate's FEC summary: every committee the candidate has authorized, combined, as filed through the coverage date shown.

Polling

4 listed · newest first
Newest field end 2026-10-25
Pollster / sponsorField datesSampleHackettAndrewsWhitenerGrahamOthers
Targoz Market Research2026-10-16 to 2026-10-25LV · n=8951.0%46.0%2.0%47.0%none
East Carolina University2026-10-19 to 2026-10-24LV · n=9551.0%47.0%1.0%51.0%none
InsiderAdvantage2026-09-28 to 2026-09-29LV · n=1,2003.0%45.0%2.0%46.0%none
InsiderAdvantage2026-09-08 to 2026-09-09LV · n=1,200not named43.2%not named45.1%none
Polling data CC BY 4.0 (FiveThirtyEight / VoteHub).

    Seat lean · Hume PVI

    as of cycle 2024
    R+8
    Lean (D minus R, points)
    -8.273
    Presidential cycles
    2020, 2024
    Computed
    2026-06-08

    Hume PVI is Hidden Levers' own two-party presidential-lean index for the state, not the Cook PVI.

    Prior result, this seat

    election returns

    2020 general

    CandidatePartyVotes% of total
    Lindsey GrahamREP1,369,13754.49%
    Jaime HarrisonDEM1,110,82844.21%
    Bill BledsoeOTH32,8451.31%

    Total votes 2,512,810 · winning margin 10.28% of total (margin computed here from the cited vote counts)

    Sources: FEC filings (through Oct 14, 2026) · Polls: FiveThirtyEight / VoteHub (CC BY 4.0) · Prior result: MIT Election Data + Science Lab (CC0) · Hume PVI and Hume Outlook: Hidden Levers estimates.

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