While it’s well known that McCormick used to be a Republican before switching parties in 2021, it’s perhaps less well known that Braun also used to be registered with the opposite party.

Braun was registered as a Democrat until the 2012 cycle, perhaps a surprise for a politician ranked among the most conservative in the Senate based on DW-NOMINATE. In 2018, when he ran for Senate, he told CNN that he was only registered as a Democrat in order to vote in local primary elections and that he has always identified as a Republican regardless of his registration status.

In any case, at least according to the official records, the governor’s race in Indiana looks like it will be between two party-switchers, perhaps emblematic of the upheaval in partisan alignment we’ve seen across the nation in the last decade.

—Mary Radcliffe, 538

As I mentioned earlier, the Republican races throughout the state are crowded with anti-abortion candidates. Checking in with the early results, it looks like ABC is reporting that one incumbent on the list, Baird in the 4th District, is projected to win. ABC News is also reporting that Houchin, who currently represents the 9th District, is projected to win in her primary and will go on to seek reelection in November.

—Monica Potts, 538

We’ve got a few votes counted in the 8th District as well (8 percent of the expected vote, to be precise), which sits in the southwestern corner of the state. This seat attracted a fair bit of outside spending, both in support of Mark Messmer, the state senator currently leading the bunch, and against former Rep. John Hostettler, who represented a predecessor district in the 1990s and 2000s. The race was notable in that it represented the first time AIPAC’s affiliated super PAC, United Democracy Project, got involved in a Republican primary. Previously, it had only spent in Democratic primaries.

—Jacob Rubashkin, Inside Elections

With 12 percent of the expected vote reporting in the Republican primary for the 3rd District, Zay is at 29 percent, Stutzman is at 21 percent, Davis is at 18 percent and Smith is at 17 percent. However, Zay’s lead is likely due to the fact that Huntington County, where a lot of the reported votes are coming from, is in his state Senate district. The Associated Press has results from more counties, including populous Allen County, and currently has a different result: Stutzman 23 percent, Davis 22 percent, Smith 21 percent and Zay 19 percent.

—Nathaniel Rakich, 538

OK, after an action-packed night of Republican primaries, we’re calling it a night on here! It was a good night for embattled incumbents, establishment-backed pragmatists and supporters of Israel. Here’s a rundown of who won all the major Indiana races:

- Sen. Mike Braun walked into the Republican primary for governor as the favorite, and he walked away with the victory, despite his opponents’ strong fundraising and attacks against him. The truth is, though, there weren’t huge differences between the candidates on most issues.

- The closest race of the night was the GOP primary for Indiana’s 3rd District. ABC News is not yet reporting a projection in that race, but other outlets (such as the AP) have called it for former Rep. Marlin Stutzman. The conservative hardliner beat out several other candidates, including more moderate former Judge Wendy Davis and businessman Tim Smith.

- The one incumbent under threat tonight was Republican Rep. Victoria Spartz in the 5th District, but Spartz held off state Rep. Chuck Goodrich in her primary. Spartz had waffled on whether she’d run for reelection, having originally said in February 2023 that she wouldn’t seek another term. But this past February, she decided just before the filing deadline to run again, and she overcame Goodrich’s sizable financial edge to win renomination.

- In Indiana’s 6th District, wealthy storage company owner Jefferson Shreve outpaced a crowded Republican field. Aided by millions in self-funding and residual name ID from his recent and expensive run for Mayor of Indianapolis, the moderate Shreve outpaced more conservative candidates Mike Speedy and Jamison Carrier. He’ll be a shoo-in in the fall to replace retiring GOP Rep. Greg Pence.

- State Sen. Mark Messmer won a comfortable victory over a crowded GOP field in Indiana’s 8th District. The race attracted some national attention because a pro-Israel super PAC pumped seven figures into defeating another GOP candidate, former Rep. John Hostettler, who often voted against aid to Israel when he represented the area in the 1990s and 2000s. Messmer ultimately outpaced Hostettler by 20 percentage points and will be heavily favored in the general election this fall.

—Monica Potts, Nathaniel Rakich and Geoffrey Skelley, 538, and Jacob Rubashkin, Inside Elections

CORRECTION (May 8, 2024, 11:12 a.m.): A previous version of this blog entry misidentified Indiana 6th District Republican primary candidate Jamison Carrier as Jamison Crowder.