State House of Representatives District 99 Republican Primary Runoff
November 28, 2017 - Berkeley and Charleston Counties
OFFICIAL RESULTS
| Candidate | Berkeley | Charleston | Total | Percent |
| Nancy Mace WINNER | 1,235 | 460 | 1,695 | 62.6% |
| Mark Smith | 478 | 534 | 1,012 | 37.4% |