With over a third of the expected vote in, incumbent Scott is leading in the Democratic primary in Georgia's 13th congressional district with 60 percent of the vote so far, according to the AP. The race is a microcosm of the issues affecting the entire Democratic Party, with his younger, newer challengers attacking his age, potential health and time in office. But the crowded field my split the vote against him.

—Monica Potts, 538

We've been tracking Trump's endorsements of House candidates, and despite getting an endorsement from the former president in 2022, this time around Trump withheld his nod. Massie was the only incumbent Republican in tonight's races that Trump did not endorse -- though Trump didn't endorse any of his opponents, either. As Tia alluded to, Trump and Massie haven't always gotten along in the past.

—Mary Radcliffe, 538

Of Kentucky's five GOP incumbents, two tonight faced challengers, and both prevailed easily.

ABC News reports that Republican incumbent Rep. Thomas Massie — noted obstructionist and slinger of social media sass — will prevail over challengers Eric Deters and Michael McGinnis in Kentucky's 4th District. With around 58 percent of the expected vote reporting, he leads with 75 percent of the vote. Rep. Hal Rogers — who holds the title of House Dean, or longest serving member of the House of Representatives — had an even easier time in the 5th District. With around 52 percent of the expected vote reporting, he's garnered 81 percent.

While both these contests went as expected, Massie's did see some intrigue. Deters tried to get Massie thrown off the ballot earlier this year, and the incumbent has certainly made enemies within his own party with his hardline opposition to foreign spending and other legislation. AIPAC-affiliated ad spending in this House race was apparently intended to weaken him for potential future runs for higher office.

P.S. — If you're bored waiting for results, I highly recommend browsing the #sassywithmassie hashtag.

—Tia Yang, 538

According to The Associated Press, 10 percent of the expected vote is now reporting in the GOP primary for Georgia's 3rd District, and Jack leads Dugan 42 percent to 30 percent. Remember, though, if no one wins a majority today, this race will go to a runoff.

—Nathaniel Rakich, 538

It's primary day in Georgia, Idaho, Oregon and Kentucky! We've got a break from Senate contests tonight — none of these states have U.S. Senate seats up for election in 2024 — but we'll be closely tracking U.S. House primary action and some other key races. Here's a quick roadmap of what to expect throughout the evening.

Kentucky has the earliest poll closing time tonight (6 p.m. Eastern in the eastern part of the state, 7 p.m. Eastern in the western part), but also probably the sleepiest races, with no seriously competitive House contests. We'll see more action in Georgia, where polls close at 7 p.m. Eastern and we're tracking a competitive open-seat GOP primary and a challenge to an aging Democratic incumbent. Plus, a competitive state Supreme Court race could tell us something about how much abortion is motivating voters in a key swing state.

After that, you may want to take a dinner break or, perhaps, watch Game 1 of the NBA Eastern Conference finals. The next polls close at 10 p.m. Eastern in (most of) Idaho, where incumbent centrist Republican Rep. Mike Simpson is fending off a conservative challenger. Finally, (most of) Oregon's polls close at 11 p.m. Eastern; a couple of primaries there have seen big spending from controversial sources.

As a bonus nightcap, a special election runoff in California will have an immediate impact on House majority math as voters fill former Speaker Kevin McCarthy's old seat, which has been empty since the start of the year. Polls close there at 11 p.m. Eastern as well.
—Tia Yang, 538