Dexter was the big beneficiary of outside spending in the Democratic primary in Oregon’s 3rd District, and the early returns suggest those dollars really may have boosted her despite the fact she represents almost none of this seat in her current state legislative district. With 41 percent of the expected vote reporting, Dexter leads Jayapal 52 percent to 26 percent, so the outstanding votes are going to have to look pretty different for Jayapal to catch Dexter. Jayapal is trying to join her younger sister, Congressional Progressive Caucus Chair Pramila Jayapal, in the House.

—Geoffrey Skelley, 538

The AP is projecting that Jack and Dugan will go to a runoff to decide the Republican nominee in Georgia’s 3rd District. With 92 percent of the expected vote in, Jack has 47 percent and Dugan has 25 percent. The Trump-endorsed Jack will therefore go into the June 18 runoff a strong favorite to win.

—Nathaniel Rakich, 538

With 32 percent of the expected vote reporting in the Republican-on-Republican California 20th District special election, Assemblyman Vince Fong is leading Tulare County Sheriff Mike Boudreaux 74 percent to 26 percent. This is no surprise, since Fong had the endorsement of both Speaker Mike Johnson and ex-Speaker Kevin McCarthy, whose resignation triggered this special election.

—Nathaniel Rakich, 538

With 29 percent of the expected vote reporting in the Republican primary for Oregon's 4th District, Air Force veteran and attorney Monique DeSpain leads former Keizer city councilmember, Amy Ryan Courser, 56 percent to 43 percent. DeSpain has an endorsement from Maggie's List — one of the GOP groups formed to elect more women to office that we've been tracking endorsements from this primary cycle. The winner of this primary will face incumbent Democrat, Rep. Val Hoyle in what's expected to be a competitive race.

—Meredith Conroy, 538 contributor

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