ABC News reports that state Sen. Mark Messmer is projected to win the crowded GOP primary in Indiana's 8th District, which is currently held by Rep. Larry Buschon. Messmer defeated former Rep. John Hostettler and several other candidates in a race that attracted significant outside spending.

—Jacob Rubashkin, Inside Elections

Indianapolis’s Marion County is reporting votes now in Indiana’s 6th, too. And according to the AP, Shreve is beating Speedy there 38 percent to 29 percent, likely cutting off any chance for the more conservative Speedy to prevail.

—Nathaniel Rakich, 538

The Associated Press has projected that state Sen. Mark Messmer has won the GOP nomination in the 8th District. He will likely win the general election this fall. ABC News is not reporting a projection in the race yet, but Messmer has about 43 percent of the vote — 27 percent more than his closest challenger — with 40 percent of the expected vote reporting.

—Jacob Rubashkin, Inside Elections

We’re up to about half of the expected vote counted in Indiana‘s 6th District, and Jefferson Shreve is still holding steady in the lead with 29 percent. Jamison Carrier and Mike Speedy are running behind at 21 and 20 percent, respectively.

—Jacob Rubashkin, Inside Elections

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.