COLUMBIA - Former Attorney General Henry McMaster has advanced to a runoff to be the Republican nominee for lieutenant governor.

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.

The second-place finisher is too close to call between retired Kiawah Island developer Pat McKinney and Mike Campbell, son of the late Gov. Carroll Campbell. The runoff will be June 24.

The winner will face Democratic state Rep. Bakari Sellers in November. Sellers did not run to retain his District 90 seat in the Statehouse.

In other statewide races, three incumbents won their GOP primaries. Neither Adjutant General Bob Livingston nor Treasurer Curtis Loftis face any opposition in November.

Agriculture Commissioner Hugh Weathers faces two third-party candidates in November: American Party candidate Emile DeFelice and United Citizens Party candidate David Edmond.

Loftis has spent much of his tenure fighting with the Retirement System Investment Commission, the agency that invests South Carolina's pension portfolio. Adams jumped into the race in late March, saying he wanted to give voters a choice. His campaign had less than $3,200 available as of May 31.