South Carolina Senate Runoff & Precinct Vote Simulator

SC County Runoff Map

Click a key county to adjust regional parameters or inspect primary weight.

County Runoff Lead

Candidate A

Candidate B

Statewide Turnout Retention 65%

Runoffs average 20-40% drop-off from primary base.

Third-Candidate Swing to A +5.0%

Shift undecided/third-party vote share towards A or B.

Greenville County Key County

Total Base Voters

120,000

Projected Runoff Margin

Candidate A +12.0%

Candidate A Share

53.0%

Candidate B Share

47.0%

Projected Winner Candidate A

Candidate A: 185,200

Candidate B: 162,800

Margin Gap: 22,400 votes (6.40%)

Greenville and Spartanburg Upstate turnout retention provides Candidate A a crucial firewall against Lowcountry gains for Candidate B.

County	Base Voters	Cand A	Cand B	Lead

Outcome: Candidate A +6.40%