The endorsement of Attorney General Alan Wilson by his former rival, U.S. Rep. Nancy Mace, appears to have reshaped the odds in the prediction market for South Carolina's Republican gubernatorial nominee. In the session on Monday, June 14, 2026, contracts for Lt. Gov. Pamela Evette to win the nomination saw a notable 10.0 percentage point drop, falling to 42.0%, while contracts for Wilson rose, flipping him into the favorite position. The shift suggests traders are pricing in a tougher-than-expected runoff for Evette, despite her first-place finish in the primary and a key endorsement from former President Donald Trump.
The repricing follows the June 9 Republican primary, where no candidate secured the required 50% majority, triggering a runoff between the top two finishers: Evette (28.9%) and Wilson (26.1%). Immediately after conceding, Mace, who finished a distant fifth, endorsed Wilson, signaling a potential consolidation of the non-Evette vote that could alter the dynamics of the June 23 contest.
Distribution Analysis
| Outcome | Current Prob | Change | Volume |
|---|---|---|---|
| Alan Wilson | 55% | +5.0pp | 9,295 |
| Pamela Evette | 42% | -10.0pp | 16,621 |
Net: The market repriced sharply, with probability shifting decisively from Evette to Wilson, who is now priced as the likely nominee.
What's Driving the Shift
The significant move in the market, which trades on the CFTC-regulated exchange Kalshi, appears to be driven by several factors related to the post-primary landscape.
Post-Primary Consolidation: The most direct catalyst appears to be the immediate endorsement of Alan Wilson by Nancy Mace. On primary night, Mace stated, "I want a law and order, governor. And that law and order governor is going to be Alan Wilson." While Mace's vote share was modest at 12.1%, her quick and forceful backing of Wilson provides him with momentum and signals to her supporters where to align. Traders seem to interpret this as the beginning of a consolidation of the 45% of the primary electorate that voted for candidates other than Evette or Wilson.
Runoff Dynamics vs. Primary Strength: Evette entered the runoff as the frontrunner, having finished first in the primary and secured the coveted endorsement of Donald Trump. However, runoff elections often have lower and more unpredictable turnout. The market's shift suggests a belief that Wilson, a two-term attorney general and the son of a long-serving congressman, may be better positioned to unify various factions of the party and turn out supporters in a head-to-head contest.
Escalating Campaign Intensity: Both campaigns are preparing for a short but intense two-week runoff. Reports indicate that Evette's campaign has already launched new attack ads, while Wilson's camp is highlighting what they frame as her unwillingness to debate and ambiguous policy positions. This new phase of the campaign, combined with an estimated $17.5 million spent on television advertising in the primary alone, points to a bruising contest where momentum can shift quickly.
Market Context
The race to succeed term-limited Gov. Henry McMaster is the first open Republican primary for governor in South Carolina since 2014. Evette, the current Lieutenant Governor, leveraged endorsements from both McMaster and Trump to secure her first-place finish. Trump's influence remains potent in the state, with Evette's campaign manager stating they "feel really good about the fact that the president is going to be here strong for us."
However, the market repricing indicates that traders view the runoff as more than a simple referendum on Trump's endorsement. Wilson is a well-established statewide figure who has also cultivated ties to the former president, traveling to New York to support him during his hush money trial. The shift toward Wilson suggests a view that his institutional support and potential to unite the non-Evette wing of the party may outweigh the "rocket fuel" of Trump's backing that propelled Evette in the crowded primary field.
What to Watch
The key events for this market are now in the immediate future. The South Carolina Republican Party has announced a debate between Evette and Wilson for June 16, which will be a critical opportunity for both candidates to make their case directly to voters. Traders will also be watching closely for any further endorsements from defeated candidates, particularly U.S. Rep. Ralph Norman, who finished third. The runoff election will take place on June 23, 2026, which will settle the market. The winner will face state Rep. Jermaine Johnson, who won the Democratic primary outright.
