Spartz came into tonight as clearly one of the most endangered incumbent House members in the country. But with her primary victory, still just one incumbent has met defeat so far this primary season: Republican Rep. Jerry Carl, who lost in an incumbent-versus-incumbent clash in Alabama on March 5 against Rep. Barry Moore due to redistricting pushing the two into the same dark red seat. However, there are many months to go before all primaries are completed, so definitely do not rule out another incumbent going down in a primary.

—Geoffrey Skelley, 538

So far in 2024, the GOP seems to be running behind where it was last cycle when it comes to nominating women in competitive or safe seats. Tonight, female incumbents Houchin and Spartz held on and will very likely win reelection in the fall. But a couple qualified female candidates didn’t fare as well tonight. The sitting lieutenant governor, Crouch, lost the gubernatorial primary, and in the 3rd District, it looks like Davis also failed to win. Both of these women could’ve benefited from more unified support. Although Crouch had endorsements from lower level officials, the Club for Growth and Trump endorsed Braun. And in the 3rd, the Club for Growth actively campaigned against Davis. Women, especially Republican women, face many invisible hurdles in their effort to win elected office. Add hurdles like these, and the challenge is insurmountable.

—Meredith Conroy, 538 contributor

Braun was the front-runner in the Republican gubernatorial primary tonight, and he ended up winning. But the candidates weren’t that different on many of the issues. As other observers noted, the primary was fought more over big national issues like crime, China, immigration and abortion than over the day-to-day running of the state. The way the race unfolded tells us a lot about the direction of the Republican Party nationally, and the candidates we can expect deep-red states like Indiana to send to Washington. Among other things, that’s meant that the party continues to run conservative anti-abortion candidates despite the position being unpopular, and an often losing one, for Republicans in general.

—Monica Potts, 538

With most of today’s primaries now projected, we’re going to sign off soon. But first: What were everyone’s takeaways from the night?

—Nathaniel Rakich, 538

As Meredith alluded to, the GOP primary in the 5th District is competitive today after Spartz decided to seek reelection, but only after a Hamlet rendition of "to run or not to run."

In February 2023, Spartz surprised the political world by announcing that not only would she not run for Indiana's open Senate seat, she also wouldn't seek reelection. She then repeatedly flip-flopped on whether she might reconsider her decision before announcing in February that she would indeed seek reelection, just days before the filing deadline. Spartz's decision upset the plans of the many GOP contenders who'd entered the race in the meantime — 11 candidates (including Spartz) are on the primary ballot.

However, state Rep. Chuck Goodrich looks like a real threat to Spartz. The CEO of an electrical contracting company, Goodrich has self-funded heavily — $4.6 million of the $5.5 million he'd raised as of April 17 — to give himself a significant financial advantage over Spartz, who had only raised $581,000 after barely fundraising throughout 2023. Even with the money she already had in the bank, Spartz has been outspent $4.1 million to $2 million by Goodrich.

Goodrich has emphasized his America First views and attacked Spartz, most notably by casting her as overly supportive of Ukraine in its war against Russia. Spartz is Ukrainian American, and Goodrich has claimed she's been "putting Ukraine first" while using an image of Spartz with Biden after the passage of Ukraine military aid in 2022. However, Spartz's record is more nuanced: She has been critical of Ukrainian President Volodymyr Zelenskyy and opposed the most recent round of Ukraine aid that Congress passed in April.

Yet Goodrich's attacks may be working: A late March poll for his campaign by pollster Mark It Red found him almost running even with her, trailing just 33 percent to 30 percent — a change from earlier polls that gave the incumbent a larger lead.

—Geoffrey Skelley, 538