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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North Dakotans on track to set a maximum age for their congressional delegation

Also on the ballot tonight in North Dakota: a ballot measure that would block anyone from being elected or appointed to the House or Senate from the state if they would turn 81 before their term ended. With 19 percent of the expected vote reporting, the measure is currently supported by 62 percent of the electorate. If the results hold, it would become the first state in the nation with a maximum age for elected office.

The only preelection polling we saw on this measure came from RMG Research/U.S. Term Limits in April/May, and showed voters in support of the measure by 65 percentage points, 78 to 13 percent. So while the measure may be somewhat underperforming, it's still on track to become the law of the land in North Dakota — if it can survive the inevitable legal challenges.

—Mary Radcliffe, 538


Will Biggs even stay in the race for the runoff?

As Meredith has noted, Biggs is one of the House GOP’s best chances yet to add a new woman to their caucus. However, I wonder if she will even stay in the race for the June 25 runoff. As David Bernstein notes on BlueSky, twice so far this year (in North Carolina’s 6th and 13th), a Republican candidate has made it to a runoff against a candidate endorsed by Trump only to drop out of the race because they faced such low odds of winning.

—Nathaniel Rakich, 538


It's a runoff in South Carolina's 3rd!

The AP is projecting the GOP race to replace retiring Rep. Jeff Duncan in South Carolina's 3rd District will go to a runoff, with pastor Mark Burns and Air National Guard Lt. Col. Sheri Biggs squaring off. With 85 percent of the expected votes counted, Burns currently leads with 32 percent of the vote, with Biggs tailing him with 29 percent of the vote. With those margins, it's anyone's race in two weeks!

—Kaleigh Rogers, 538


Armstrong projected to win Republican gubernatorial primary

With 20 percent of the expected vote in, the Associated Press is projecting that Armstrong will win the North Dakota Republican gubernatorial primary, with 67 percent of the vote so far, compared to Miller's 33 percent. It's a quick result for such a contentious race, where the candidates shared many agreements over policy. Armstrong is likely to triumph over Piepkorn in November in this very red state (although we don't know who would win a singing contest.)

—Monica Potts, 538


Women we're watching tonight: Will Fedorchak be the first non-incumbent woman nominated in a safe red seat?

According to our recent analysis of primaries this cycle through May 21, 41 percent of Democrats' nominees (that is, primary winners) for House, Senate and governor are women, compared to just 16 percent of Republicans'. That's a big difference. To date, no non-incumbent Republican women have won a nomination for a safe Republican seat in November — and there were certainly plenty of opportunities, given a high number of GOP (and overall) retirements this year. In short, Democrats are nominating many more women than Republicans thus far, and doing so in places where their chances are better in November.

Tonight there is at least one Republican woman with a good shot at bucking that trend and effectively claiming a safe red seat in November: North Dakota Public Service Commissioner Julie Fedorchak, who's running for the state's open at-large House seat. In addition to endorsements from several of the women's groups we're tracking (E-PAC, VIEW PAC and Winning for Women), she has Trump's endorsement, too.

Another Republican primary of note features two women, and GOP women's groups, going head-to-head: In South Carolina's 1st District, incumbent Rep. Nancy Mace faces several challengers, but her most notable opponent is former state cabinet official Catherine Templeton. Templeton is endorsed by Winning for Women, while Mace is endorsed by VIEW PAC (and notably, Trump). It's the first race we've seen so far in this season where two of the women's groups we're tracking are actively endorsing against each other.

On the Democratic side, three incumbent Democratic women in Nevada — Sen. Jacky Rosen, Rep. Susie Lee and Rep. Dina Titus — should cruise to victory with no serious competition in their primaries today, but they'll be watching today's GOP primaries to see which Republicans they'll face in November, when their races could be close, as Geoffrey wrote in 538's primary preview.

Meredith Conroy, 538 contributor