If Biggs wins her race in South Carolina’s 3rd, that will be notable not only because the Trump endorsee would lose, but because the GOP has been slow to nominate women for safe Republican seats. Earlier in the cycle, in North Carolina’s 13th (a safe red seat), Kelly Daughtry was a contender, where she was set to face off against Brad Knott in a runoff. However, Trump endorsed Knott ahead of the runoff, and she dropped out.

—Meredith Conroy, 538 contributor

The AP reports that about 82 percent of the expected vote has reported from the GOP primary runoff in South Carolina's 3rd District, and Biggs's lead over Burns now stands at around 4 points, 52 percent to 48 percent. Looking at the results from the South Carolina Election Commission, Burns has not gotten the boost from the Election Day vote that we expected. In fact, Biggs leads among votes cast on election day, 53 percent to 47 percent, and that group of votes looks set to make up close to 80 percent of the final overall vote total. (Biggs leads 51 percent to 49 percent among the smaller number of early and absentee votes.)

—Geoffrey Skelley, 538

Utah 2nd District Rep. Celeste Maloy is the last moderate incumbent in Utah who has drawn a right-wing challenger, and she may be in slightly more danger than the others. Not only did she lose the state party's endorsement at its April convention, but she only narrowly won the Republican nomination for this seat in a 2023 special election with 39 percent of the vote. Her opponent this time around, Army veteran Colby Jenkins, has also raised a credible $379,000, and tea party-aligned outside groups have spent $534,000 to support him. But while Jenkins has the influential support of Lee, Trump's last-minute endorsement of Maloy may have halted Jenkins's momentum.

—Nathaniel Rakich, 538

We're also keeping an eye tonight on a few mild-mannered Republican incumbents who are probably safe for reelection but have displeased the GOP's right flank enough to earn a primary challenge.

For example, hardline state Rep. Phil Lyman won the state GOP's official endorsement for governor over incumbent Gov. Spencer Cox at an April party convention, but a HarrisX/Deseret News/University of Utah poll earlier this month showed Cox leading Lyman 71 percent to 29 percent among the broader primary electorate. (Republican conventions in Utah, which are largely attended by dogmatic party activists, tend to be more conservative in their tastes than voters.)

Similarly, in the 1st District, electrician Paul Miller defeated Rep. Blake Moore at the party convention and could tap into some level of discontent with Moore's moderate voting record, but he's raised all of $4,706 for the cycle, so he's unlikely to actually defeat the incumbent.

—Nathaniel Rakich, 538

And with that, we’re calling a lid on one of the busiest primary nights of the year! Here’s a recap of what went down.

First, in the two highest-profile races of the night, controversial incumbents went 1-for-2:

- In New York’s 16th District, the AP has projected that Westchester County Executive George Latimer will defeat progressive Rep. Jamaal Bowman in the Democratic primary. This race was defined largely by internal Democratic divisions over the Israel-Hamas conflict and the influence of pro-Israel groups, although controversies about Bowman's past behavior certainly made him more vulnerable.

- In Colorado’s 4th District, the AP has projected that Rep. Lauren Boebert will win the GOP nomination. Boebert caused a lot of grumbling after switching districts from the 3rd, on the other side of the state, but she ultimately won easily thanks to her big fundraising advantage, Trump’s endorsement and ton of name recognition.

It was a bad night for Trump-endorsed candidates in competitive races, three of whom lost:

- The AP has projected that Air National Guard Lt. Col. Sheri Biggs will narrowly defeat Trump-endorsed pastor Mark Burns in the Republican runoff in South Carolina’s 3rd District..

- According to the AP, Jeff Crank, a conservative talk radio host, won the Republican primary in Colorado’s 5th District, defeating state party chair and Trump endorsee Dave Williams.

-In the Republican primary for U.S. Senate in Utah, Rep. John Curtis defeated Trump-endorsed Riverton Mayor Trent Staggs. Curtis will follow in the moderate footsteps of Sen. Mitt Romney, who is retiring from this seat.

Both parties also chose their nominees for some competitive House races this fall — and in general, they chose the more electable options.

- The AP has projected attorney Jeff Hurd will win the Republican primary in Colorado's 3rd District. Republicans avoided nominating former state Rep. Ron Hanks, who was so conservative he risked losing this light-red seat to Democrat Adam Frisch.

- The AP has projected that state Rep. Gabe Evans has won the Republican primary for Colorado's 8th District over state-party-endorsed Janak Joshi. Evans will face off in November against Democratic Rep. Yadira Caraveo, who won this district by just over 1,600 votes in 2022.

- In New York’s 1st District, former CNN anchor John Avlon won the Democratic primary against 2020 nominee Nancy Goroff. He’ll face Republican Rep. Nick LaLota this fall.

- In New York’s 22nd District, the AP has projected that state Sen. John Mannion will win the Democratic primary against DeWitt Town Councilor Sarah Klee Hood. Mannion will face Republican Rep. Brandon Williams in this blue-leaning district in the general.

However, conservative Republicans did score a win in one solid-red open seat:

- In Utah’s 3rd District, the AP has projected that state Sen. Mike Kennedy, who was endorsed by Sen. Mike Lee, will win the GOP nomination to succeed Curtis. Kennedy outpaced four other contenders, including trampoline tycoon Case Lawrence, who self-funded his bid but came in second place.

Finally, a number of other incumbents also beat back notable challengers tonight:

- The AP has projected that incumbent Gov. Spencer Cox will defeat state Rep. Phil Lyman in the Republican primary for Utah governor. However, Lyman, who was running to Cox’s right, still took more than 40 percent of the vote.

- Moderate Rep. Blake Moore also won renomination in Utah’s 1st District, according to the AP, easily dispatching a more conservative challenger.

- The AP has projected that Rep. Claudia Tenney will win the Republican primary in New York's 24th District over businessman Mario Fratto, who came within 14 points of unseating her in 2022.

—G. Elliott Morris, Monica Potts, Nathaniel Rakich, Kaleigh Rogers and Geoffrey Skelley, 538; Meredith Conroy, 538 contributor; and Jacob Rubashkin, Inside Elections