What to watch: South Carolina will hold a runoff election for the Republican nomination for governor after the incumbent, Gov. Henry McMaster, failed to win more than 50 percent of the vote in the Republican primary this month. See full results from the state’s primary » Read more

Mr. McMaster, who took over as governor after Nikki Haley joined the Trump administration last year, is running for his first full term in the governor’s mansion.

His opponent in the runoff is John Warren, a businessman and self-styled political outsider, who won about 28 percent of the primary vote.

— MAGGIE ASTOR