South Carolina, Nevada, North Dakota primaries and Ohio special election 2024: Nancy Mace, Sam Brown win

Democrats nearly won a safely Republican congressional seat.

June 11 was another packed primary day, as voters in South Carolina, Maine, North Dakota and Nevada weighed in on who will make the ballot this fall. We had our eyes on a slew of Republican primaries on Tuesday, including several competitive contests for U.S. House seats, as well as contests to pick Nevada's GOP Senate nominee and effectively pick the next governor of North Dakota.

In South Carolina, Rep. Nancy Mace's Trumpian pivot didn't cost her, as she handily fended off an establishment-aligned primary challenger. Fellow incumbent Rep. William Timmons, who was looking vulnerable after an infidelity scandal, also came out ahead in a closer race against his right-wing challenger. In North Dakota's At-Large Congressional District, Julie Fedorchak became the first non-incumbent woman this cycle to win a GOP primary for a safely red seat. In Nevada, Republican voters chose Sam Brown as their candidate to challenge incumbent Democratic Sen. Jacky Rosen this fall.

Finally, a special election is set to give House Republicans one more seat of breathing room, as voters in Ohio's 6th District filled the seat vacated by Rep. Bill Johnson's departure in January — though not without some unexpected suspense.

As usual, 538 reporters and contributors broke down the election results as they came in with live updates, analysis and commentary. Read our full live blog below.


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One candidate tonight could help fill your dramatic campaign ad fix

I don't know about the cinematography, Monica, but if Halo composer and NV-03 candidate Marty O'Donnell comes out on top in his GOP primary tonight, I hope we'll see some great campaign ad scores from him.

—Tia Yang, 538


Burgum’s ad was notable for another reason …

… It was one of the few times a public figure claiming to be from a "small town" was legitimately from a small town. Burgum’s hometown, Arthur, North Dakota, has a population of 328 at the 2020 census. That’s even smaller than 538's tiny-town contingent: My hometown population is 506, and Monica’s hometown has a population of 2,500.

—Kaleigh Rogers, 538


Will the next North Dakota governor ever make a video like this?

One of the races I'm watching tonight is the Republican primary for North Dakota's governor, and, as Geoffrey noted earlier, that race has been increasingly heated. Of course, the Republican nominee is seeking to replace Burgum, who is retiring after a brief run for the Republican nomination for president, and amid chatter that he could be Trump's vice presidential pick. So I'd just like to take a moment to remember this cinematic video Burgum used to launch his presidential campaign, with a voiceover that praised small-town values over scenic images of hills and livestock. Maybe we can look forward to such a video one day from his successor.

—Monica Potts, 538


The winner of Maine's 2nd District GOP primary will face an endangered Democratic incumbent in fall

Maine's 2nd District is host to a GOP primary in which two first-term state representatives, Austin Theriault and Mike Soboleski, are contending for the right to take on three-term Democratic Rep. Jared Golden. The incumbent has managed to hold onto this seat, which takes in most of Maine north of its southern coastal area, despite its slight Republican lean: Trump would have carried it 51 percent to 45 percent in 2020, according to Daily Kos Elections, making it the second-most Republican-leaning seat (by presidential vote) that a Democratic incumbent is defending in 2024, trailing only Rep. Mary Peltola's at-large seat in Alaska.

Theriault, a former NASCAR driver, looks to be favored. He has Trump's endorsement, which he's naturally emphasized in his ads, and he's congressional Republicans' top choice, having earned the backing of Speaker Mike Johnson and the Congressional Leadership Fund. Moreover, Theriault has raised $1.2 million to Soboleski's $117,000. The only somewhat recent poll was an early April survey from Public Opinion Strategies on behalf of Theriault's campaign that found him leading Soboleski 30 percent to 7 percent. But while Theriault has Trump's backing, Soboleski aligns with the former president — and around two-thirds of Republicans nationally — on the question of the 2020 election's legitimacy. Unlike Theriault, Soboleski has echoed Trump's unsupported claim that Biden didn't legitimately win.

—Geoffrey Skelley, 538


So far, 2024 has been a good year for House incumbents

After tonight, we'll have seen downballot primaries in 26 states, and so far the only incumbent that has lost renomination is Jerry Carl, who due to redistricting had to run in an incumbent-on-incumbent battle against Barry Moore in Alabama's 1st district. With Mace's race now called in her favor and Timmons ahead by around 10 percentage points, it looks like tonight might continue the streak.

However, that's not too unusual. Based on my quick calculations, on average over the last 7 election cycles, just 8 incumbents who faced a primary challenger lost renomination, and in 4 of those 7 cycles, there were 5 or fewer incumbents that failed to secure their party's nomination.

But we may be on track to break the incumbent winning streak as early as next week, when Virginia representative Bob Good faces state senator John McGuire, a Trump endorsed challenger. Polls show that race up in the air, with two polls conducted since Trump's endorsement showing nearly opposite results. And the following week, Democrat Jamaal Bowman of New York's 16th faces a very tough challenge from Westchester County Executive George Latimer. So don't expect Jerry Carl to be the lone incumbent loser when all is said and done.

Mary Radcliffe, 538