Senator Lindsey Graham of South Carolina won his Republican primary election on June 10, defeating a wealthy challenger to secure his party's nomination for another Senate term. The victory allows Graham to advance toward the general election without the need for a runoff.

In the state's gubernatorial contest, Lt. Governor Pamela Evette, who carries an endorsement from former President Donald Trump, advanced to a runoff against state Attorney General Alan Wilson. Neither candidate secured the outright majority required to avoid a runoff under South Carolina's election rules.

Evette's advancement was widely anticipated given Trump's backing, which has proven influential in Republican primaries across the country in the 2026 cycle. Wilson, a prominent state official in his own right, demonstrated enough support to force the two-candidate runoff rather than concede the field to the Trump-endorsed candidate.

South Carolina's primaries were among several held that day, with results also coming in from Maine and other states. The outcomes reflect ongoing dynamics within the Republican Party as it heads into the 2026 midterm cycle, including the continued weight of Trump endorsements in statewide races.

The runoff between Evette and Wilson is expected to be competitive, with both candidates appealing to the state's conservative base. Graham, a longtime incumbent, now turns his attention to the general election contest in November.