In Ohio's 11th Congressional District, incumbent Rep. Shontel Brown is projected by ABC News to defeat progressive challenger Nina Turner for a second time, marking a victory for President Joe Biden's endorsement power.

Brown was first elected to Congress in a special election last year following former Rep. Marcia Fudge's appointment to serve as secretary of the Department of Housing and Urban Development.

Biden offered his second endorsement of the midterm cycle to Brown last Friday, calling her "an ardent advocate for the people of Ohio and a true partner in Congress," while leading progressive voices like Sen. Bernie Sanders of Vermont and Rep. Alexandria Ocasio-Cortez, D-N.Y., backed Turner.

Turner, a former co-chair of Sanders' 2020 presidential campaign, had previously criticized the Democratic Party and Biden's leadership.

ABC News has projected that Erin Houchin, a former state senator, as the winner of the Republican House primary in Indiana’s 9th Congressional District.

"I am honored that Hoosier Republicans across Southern Indiana have entrusted me with their vote," Houchin said in a statement. "I’ve spent my life in the Ninth District, and look forward to carrying our momentum through November and being the proven conservative fighter we need in Washington. It’s time to push back against the radical Biden-Pelosi agenda and take our country back."

The seat was the only vacant congressional seat in the state after Republican Congressman Trey Hollingsworth announced he wouldn't seek reelection.

Fresh off his projected win, J.D. Vance thanked former President Donald Trump for his endorsement as he celebrated his projected primary victory with supporters in Cincinnati on Tuesday.

"I have got to absolutely thank the 45th President Donald Trump. One, for giving us an example of what could be in this country… and endorsing me," Vance said.

Trump's endorsement of Vance, the "never-Trumper" turned Trump ally, was not well received among all Republicans. Many criticized Trump's pick, bringing up past comments Vance made attacking Trump supporters -- but Vance still prevailed.

The "Hillbilly Elegy" author drew upon his midwest working-class background throughout the campaign. He initially struggled to stand out from a crowd of MAGA Republicans, but Trump's endorsement gave him a significant boost that he used to carry him to victory, focusing the fight on "America First" values in recent weeks.

Vance is expected to face Democratic Rep. Tim Ryan in the general election.

In the Ohio Republican primary for Senate, ABC projects "Hillbilly Elegy” author J.D. Vance as the winner, marking a massive victory for former President Donald Trump.

Polling showed Vance fading into third place in the weeks leading up to the election, behind Mike Gibbons and Josh Mandel, but an eleventh-hour endorsement from the former president vaulted Vance into front-running status.

The "never-Trumper" turned Trump ally will face Democratic Rep. Tim Ryan in the fall.

Trump also endorsed former aide Max Miller in Ohio's 7th Congressional District. Miller was also projected to win his primary race on Tuesday.