Though Trump has already clinched the 2024 Republican presidential nomination, many states have yet to vote in their party primary. Political observers have been closely watching Trump's margins in these states for any potential signs of weakness with his base ahead of the general election. While many who vote against Trump in the primary probably weren't going to vote for him in the general election anyway, former U.N. Ambassador Nikki Haley, who dropped out of the presidential race in March, has routinely been garnering between 15 and 20 percent of the vote in primaries since then, a potential sign of dissatisfaction with Trump among some Republicans.

Whether or not you think that means trouble for Trump in November, he's not having that problem in Kentucky tonight: With 72 percent of the expected vote in, the former president is currently winning 85 percent of the vote, while Haley is at just 6 percent.

—Cooper Burton, 538

Two of the four anti-abortion Republican candidates we've been tracking in Kentucky are projected to win their races, according to The Associated Press. Incumbents Guthrie and Massie prevailed against their challengers, while Edwards lost to incumbent Rogers.

In Georgia, Yu, McCormick, Scott, Clyde, Collins, and Greene were uncontested in their respective districts. In the 11th District Republican primary, Loudermilk is projected to defeat his challenger. With just over half the expected vote reporting, he has 88 percent of the vote.

—Monica Potts, 538

Looking a little further down the ballot in the Peach State, Democrats are hoping they can reclaim the state legislative 56th District in Atlanta. Technically, Democrats won this seat in the last election, but state Rep. Mesha Mainor switched parties last year, after Democrats criticized her conservative stance on issues like school vouchers and policing.

Mainor is running unopposed in the GOP primary tonight, but four candidates are vying for the Democratic nomination, including 23-year-old public school math teacher Bryce Berry, who is currently leading with 55 percent, with half of the expected votes in. Berry has accumulated a decent war chest for a state House race, and has the endorsement of some high profile state Democrats, including House Democratic chairman Bill Mitchell and several local state Reps and state Senators, so it's not a total surprise to see him in the lead. If he wins the nomination tonight, he'll square off against Mainor in the fall to see if the Democrats can prevail despite no longer having the incumbent candidate.

—Kaleigh Rogers, 538

It’s only 8 p.m. Eastern, and yet 40 percent of the statewide vote is reporting in Georgia and we have a pretty good feel for where these races are headed. That could be a good sign for November, when Georgia will obviously be one of the most closely watched states in the nation. A clear winner here early-ish on election night would do a lot to avoid a repeat of 2020, when a winner wasn’t projected until the Saturday after the election. (And yes, I’m still traumatized from that.)

—Nathaniel Rakich, 538

Looking ahead to Oregon's results, the Portland-based 3rd District hosts one of the big contests of the night. Longtime Rep. Earl Blumenauer's retirement has left open this solidly blue seat, and three contenders with progressive brands are competing for the Democratic nomination: state Rep. Maxine Dexter, former Multnomah County Commissioner Susheela Jayapal and Gresham City Councilor Eddy Morales. At first blush, Jayapal looked to be the front-runner, as she previously represented close to 30 percent of the 3rd District's overall population — far more than Dexter or Morales. She also sports ties to national progressives via her younger sister, Washington Rep. Pramila Jayapal, who chairs the Congressional Progressive Caucus.

Yet a late campaign cash bonanza may have turned the race on its head, to Dexter's benefit. Pre-primary financial reports through May 1 showed that Dexter had received a massive late boost to bring her campaign total to $919,000, ahead of Jayapal's $773,000 and Morales's $606,000. And from May 2 to May 19, Dexter reported $419,000 in major contributions, far more than her opponents' combined $150,000. Meanwhile, outside groups have spent more than $5 million either supporting Dexter or opposing Jayapal. The 314 Action Fund, a progressive group that supports candidates with science backgrounds, has doled out $2.2 million on ads promoting Dexter and a super PAC with unclear ties, Voters for Responsive Government, has spent $3.2 million on spots attacking Jayapal.

This surge of money has brooked controversy because it appears at least partly connected to the American Israel Public Affairs Committee, a bipartisan pro-Israel group opposed to progressive critics of Israel's military action in Gaza. While Dexter supports "a negotiated cease-fire" and Morales has called for aid to Gaza, Jayapal has emphasized her consistent and early calls for a cease-fire — so it would follow that groups like AIPAC would prefer that someone else wins. Tellingly, an analysis by Oregon Public Broadcasting found that a substantial portion of Dexter's last-minute donors have a history of giving to AIPAC, and some recently supported notable Republicans such as House Speaker Mike Johnson.

More controversially, The Intercept published reports in early May alleging that AIPAC funneled money to the 314 Action Fund to spend on Dexter's behalf, presumably because more direct intervention by AIPAC could backfire in a progressive-inclined district. The 314 Action Fund denied the allegations, and in the last pre-primary filing from the group on Monday evening, it turned out that a substantial chunk of the organization's recently raised cash came from billionaire former New York City Mayor Michael Bloomberg and financier Rob Granieri. Either way, the money could prove to be a massive difference-maker for Dexter's campaign.

—Geoffrey Skelley, 538