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

We're also monitoring the GOP primary in the 1st District, a light-blue seat in and around Las Vegas held by Democratic Rep. Dina Titus. In the 2022 general election, Titus defeated Army veteran Mark Robertson by nearly 6 percentage points, but Robertson is back for another go. However, he's only raised $106,000, a figure dwarfed by restaurateur Flemming Larsen, a GOP rival who has brought in a whopping $1.8 million thanks to $1.5 million in self-funding. It's unclear if a recent report by the Nevada Independent disclosing that Larsen hired undocumented immigrants at his southern California restaurants will notably impact the race.

—Geoffrey Skelley, 538

The AP now estimates that virtually all of the vote is counted in Ohio's 6th District, and the final-ish margin is Rulli 55 percent, Kripchak 45 percent. According to a weighted average of presidential results in this district, this is an R+32 district, which means Democrats overperformed here by a whopping 22 points.

Obviously, that's a very impressive performance by Democrats. However, one special election on its own doesn't necessarily mean anything. That said, the average of a party's overperformance in special elections for the cycle has historically been correlated with its performance in the subsequent general election, and that's good news for Democrats. On average this cycle, they have now overperformed in federal special elections by an average of 7 points — not Ohio 6th-level, but still quite solid.

—Nathaniel Rakich, 538

It's 10 p.m. Eastern, and polls are now closed in the Silver State, our last primary state of the evening. Nevada law says that the state can't report results until the last voter in line has voted, so we may not see results right away. (But once we do, it will likely be a big chunk of the final tally.)

—Tia Yang, 538

In another race mostly situated in the Las Vegas area, Democratic Rep. Steven Horsford will be defending the blue-leaning 4th District, and the two principal GOP contenders are retired Air Force Lt. Col. David Flippo and former North Las Vegas Mayor John Lee. Flippo has raised $927,000 to Lee's $851,000 — both candidates have self-funded more than half of their totals — but Lee may have the upper hand here, thanks to endorsements from Trump and Lombardo. However, Lee is a former Democrat who switched parties ahead of a failed bid for the Republican nomination for governor against Lombardo in 2022, which could weaken his appeal among primary voters.

—Geoffrey Skelley, 538