Former Attorney General Henry McMaster has advanced to a runoff to be the Republican nominee for lieutenant governor.
But who his opponent will be in that runoff is still unclear.
The second-place finisher in the four-way Republican race likely won't be official until at least Saturday.
Unofficial returns show McMaster leading the four-way GOP race with more than 40 percent of the vote. He needed to reach just above 50 percent to win the race outright.
Less than 1 percentage point separates retired Kiawah Island developer Pat McKinney and Mike Campbell, son of the late Gov. Carroll Campbell. Both got about 24 percent of the vote, with McKinney slightly leading.
County officials will rule on provisional ballots Thursday. Those include ballots cast by voters who lacked photo identification. If the gap remains less than 1 percent, an automatic recount will be ordered Friday.
State Election Commission spokesman Chris Whitmire says the commission must meet again to certify those results, possibly Saturday.
That would leave just 10 days before the runoff.
The winner will face Democratic state Rep. Bakari Sellers in November.