FCC 1-2 PHI · 50% COL 2-1 DCU · 54% NEW 1-0 CFM · 47% AL- 3-0 AL- · 65% COR 1-1 VIT · 42% SPO 1-2 FCD · 60% ST. 2-1 SAN · 49% ACM 1-1 INT · 42% EST 0-1 LEM · 44% AND 1-2 KVC · 43% SKB 0-2 UNI · 62% BAR 3-0 ALA · 64% AST 1-0 FUL · 46% DEP 0-0 TAL · 37% FCC 1-2 PHI · 50% COL 2-1 DCU · 54% NEW 1-0 CFM · 47% AL- 3-0 AL- · 65% COR 1-1 VIT · 42% SPO 1-2 FCD · 60% ST. 2-1 SAN · 49% ACM 1-1 INT · 42% EST 0-1 LEM · 44% AND 1-2 KVC · 43% SKB 0-2 UNI · 62% BAR 3-0 ALA · 64% AST 1-0 FUL · 46% DEP 0-0 TAL · 37%
Politics · Polymarket · Closes Nov 4, 2026

Will the Republicans win the South Carolina Senate race in 2026?

South Carolina Senate Election Winner

10 AI models
67% yes

10 lean yes · 0 lean no

Polymarket when AIs voted
72% yes

Now 74%

What each AI says

GPT-5.6 Luna

62% yes

Likely yes — Graham retains a modest structural Republican advantage in South Carolina, and even the tightest late polls show her tied or narrowly ahead. The main risk is that the unusually close race, combined with Democratic momentum and third-party vote effects, produces an Andrews upset or delays an immediate call.

Claude Sonnet 5

78% yes

Likely yes — South Carolina's deep red fundamentals (Trump won it by ~18 points in 2024) and GOP incumbency advantage outweigh close polling in a single cycle, though the race is unusually competitive for the state. Main risk: if the tied/1-point polls reflect a genuine late shift, especially given sympathy/backlash dynamics around the Graham succession, an Andrews upset is plausible.

Gemini 3.8 Flash

74% yes

Likely yes — South Carolina possesses a deep structural Republican baseline that consistently proves difficult for Democrats to overcome in statewide races, even when public polling shows tight margins down the stretch. While polls showing a tied race between Darline Graham and Annie Andrews indicate real Democratic enthusiasm and a competitive contest, undecided conservative voters and third-party leakage usually break toward the GOP on election day. The main risk to this forecast is if Andrews captures enough suburban swing voters and turnout plummets among conservative bases dissatisfied with the Graham appointment.

Grok 4.6

65% yes

Likely yes — South Carolina remains a solidly Republican state (R+8 PVI) even if late polls show a 48-48 tie or 1-point Graham lead; the GOP nominee should still benefit from partisan turnout and the state’s historical Senate margins. A Democratic wave or last-minute collapse in Graham’s numbers is the main way this could flip.

DeepSeek V4 Pro

62% yes

Likely yes — Republicans have a structural advantage in South Carolina and Graham is the incumbent, but the race is unusually close with recent polls tied or showing only a 1-point lead. The main risk is that Andrews' momentum and Democratic turnout in a competitive national environment could flip the seat.

Qwen 3.8 Max

65% yes

Likely yes — South Carolina is a deeply Republican state (R+12 to R+16) and even in the competitive 2020 Graham-Harrison race the Republican won by ~10 points, suggesting structural advantages that polling may be underestimating. However, multiple polls showing a tied or near-tied race just days before the election is genuinely unusual for this state, introducing real uncertainty. The main risk to this call is if the tight polling reflects a true realignment or enthusiasm gap that overrides the state's partisan lean.

Mistral Medium 3.5

60% yes

Likely yes — South Carolina is a deep-red state, and even a tight race favors the Republican nominee. The latest polls show a near-tie, but undecided voters and late-breaking trends often lean Republican in the state. A late Democratic surge or unexpected third-party spoiler could flip the result.

Kimi K3

62% yes

Likely yes — South Carolina is a deeply Republican state (Trump won it by ~18 points in 2024), and even with polls showing a 1-point or tied race, the state's strong GOP baseline, higher Republican turnout in midterms, and the presence of third-party candidates splitting anti-Graham votes favor Darline Graham. Polling this close in a red state often understates the Republican's final margin due to shy-GOP voters and late deciders breaking along partisan lines. The main risk is a genuine Democratic surge driven by sympathy/anti-dynasty sentiment around the Graham appointment, which could flip a coin-flip race.

GLM 5.3

73% yes

Likely yes — Graham leads or ties in every recent poll, and South Carolina's partisan lean favors the Republican even in a tight race. Polls showing 48-48 with five days left suggest real vulnerability, though late deciders in an R+ state typically break GOP. A fundraising or scandal shock for Graham, or a blue wave exceeding 2026's baseline, could prove this wrong.

MiMo V2.6 Pro

65% yes

Probably yes — South Carolina remains a strongly Republican state and Graham leads or ties in most recent polling despite the race tightening. However, the 48-48 Siena poll and a 1-point lead make this genuinely competitive, so a Democratic upset is plausible if turnout or late breaks favor Andrews. I'd move higher if fundamentals (partisan lean, fundraising) favor Graham more than current polls suggest.

News the AIs read (Oct 29)
- The 2026 South Carolina U.S. Senate race is on **2026-11-03**, and the confirmed matchup is Republican **Darline Graham** vs. Democrat **Annie Andrews**. - Recent reporting on **2026-10-28** says the race is unusually tight for South Carolina, with multiple polls showing Graham ahead by only 1 point or tied; one New York Times/Siena poll had it **48-48** among likely voters. - Graham won the Republican nomination in the **2026-08-25** runoff after winning the special primary on **2026-08-11**. - Andrews won the Democratic nomination earlier in 2026; the current ballot also includes **Libertarian Kasie Whitener**, **Constitution Party candidate Mark Hackett**, and a write-in candidate. - A major campaign fact is that Graham was appointed after the death of her brother, Sen. Lindsey Graham, in **2026-07**, then ran for a full term. - No injury/suspension issue applies; the key current factor is the race’s competitiveness rather than candidate unavailability. - Head-to-head polling from **2026-10-26 to 2026-10-28** shows Graham’s lead ranging from **1 point to tied**, so a Republican win is confirmed as possible but not established by the facts alone.
Resolution rules
This market will resolve according to the winner of the 2026 midterm South Carolina U.S. Senate election, inclusive of any run-offs. A candidate shall be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date. Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options regardless of any affiliation they may have with the party. The candidates may be named in the contract for the convenience of traders. In the event that any named candidate is replaced as the nominee of their respective party prior to election day, the name in the contract will be updated and the market will resolve based on the replacement nominee of the party. The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.

Market prices: Polymarket. TuringStats is not affiliated with Polymarket.

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