South Carolina U.S. Senate Primary Simulator SC Open Primary

Model 50%+1 majority vote dynamics, regional turnouts, and runoff projections across all 46 SC counties.

Presets:
Statewide Primary Standings Total Votes: 0
Candidate A (Piedmont/Upstate)
0.0%
0 votes
Candidate B (Lowcountry/Horry)
0.0%
0 votes
Candidate C (Midlands Focus)
0.0%
0 votes
50% + 1 Majority Threshold Detector Analyzing...
50% Target
Mandatory Runoff Triggered: No candidate achieved >50% vote share.
46-County Plurality & Margin Heatmap Click county to inspect detail
Candidate A Lead
Candidate B Lead
Candidate C Lead
Select a county on the map
Click any county to view local turnout, voters, and candidate breakdowns.
Simulation Dynamics & Controls
Regional Turnout Multipliers Base SC Turnout ~ 24.5%
1.0x
1.0x
1.0x
1.0x
Open Primary Crossover Voter Impact

SC primary elections do not register voters by party. Independents and crossover voters alter turnout weight in competitive contests.

+8%
2-Week Mandatory Runoff Matrix Top Two

How 3rd-place candidate supporters re-allocate votes in a two-week follow-up runoff:

55%
45%
Runoff Candidate Primary Base Reallocated Projected Runoff
Candidate A 0% +0% 0.0%
Candidate B 0% +0% 0.0%
Projected Runoff Winner: -
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