Of the numerous primary races held Tuesday, two resonated beyond state politics: the Republican gubernatorial primary in Nebraska and the 2nd Congressional District Republican primary in West Virginia.
In the rare matchup between two incumbent lawmakers in West Virginia, ABC News has projected Rep. Alex Mooney the winner.
Rep. David McKinley faced off against Mooney and three other challengers in the primary.
The McKinley-Mooney matchup was another test of former President Donald Trump's endorsement power. Trump backed Mooney, who has echoed the former president's false claims about the 2020 election. McKinley, however, had the support of Republican West Virginia Gov. Jim Justice and Democratic Sen. Joe Manchin.
Manchin even released an ad denouncing Mooney and declaring his support for McKinley.
"Alex Mooney has proven he's all about Alex Mooney. But West Virginians know David McKinley is all about us," Manchin said in the ad.
The impact of congressional redistricting was also on full display in the race.
West Virginia lost one of its three House seats, and while both existing districts lean strongly Republican, there is one fewer seat for Republicans to hold onto, according to analysis from FiveThirtyEight.
West Virginia Secretary of State Mac Warner told ABC News Live's Diane Macedo on Monday that he didn't think the Trump or Manchin endorsements would decide the race.
"He's certainly very popular… I think people still are tuned in to what he has to say. But I really don't think that's going to be the decisive factor in this election," Warner said of the former president. "Endorsements are important, but I think people really vote their conscience.
As for Manchin's endorsement, Warner was unsure of whether it would have "much play at all in this in this particular race," which is also a test of one of President Joe Biden's signature policies.
West Virginia is one of the nation’s poorest states, and McKinley is one of 13 Republicans who voted for Biden’s infrastructure bill that is expected to funnel $6 billion to the state. Mooney voted against it and won Trump’s endorsement when Biden signed the bill into law.
Greg Thomas, a Republican political consultant in the state who knows both candidates and once worked for McKinley, was of the belief that Trump's support for Mooney could, in fact, be a tipping point.
"Trump's personality isn't something that we see a lot here in West Virginia. But his issues, these are West Virginia conservative issues and have been before Trump came along," he told ABC News.
McKinley has also been hurt by Trump's focus on his vote to establish an independent commission to investigate the Jan. 6 Capitol attack.
Unfounded claims about the 2020 election overshadow the two races, as both Herbster and Mooney have pushed the false claim that the 2020 election was stolen from Trump. Herbster attended the "Stop the Steal" rally in Washington, D.C., on January 6, 2021, which preceded the attack on the U.S. Capitol. Mooney has also supported a Texas-led lawsuit seeking to throw out the election results in Pennsylvania, Georgia, Michigan and Wisconsin; and he objected to certifying the election results in Pennsylvania and Nevada.
After former President Donald Trump's endorsed candidates won in the Ohio and Indiana primaries, the Nebraska GOP gubernatorial primary will once again test the power of Trump's endorsement -- this time in a race in which established GOP state leaders have backed another candidate.
Trump has also put stock in the Nebraska gubernatorial GOP primary by backing wealthy businessman Charles Herbster, who has been accused of sexual assault by eight women -- allegations he has denied. He is engaged in a legal battle with state Sen. Julie Slama, the only accuser to be identified by name.
The former president held a rally in Nebraska last week in support of Herbster, but almost all of Nebraska's GOP establishment leaders, including Gov. Pete Ricketts, support businessman Jim Pillen in the primary.
A third contender, state Sen. Brett Lindstrom, has gained traction partly due to his endorsement from the mayor of Omaha, Nebraska's largest city.
Tuesday's primaries are coming just over a week after a Supreme Court draft opinion that would overturn the landmark Roe v. Wade decision on abortion was leaked. The impending decision has galvanized abortion rights supporters and anti-abortion rights activists alike.
Warner told ABC News Live the abortion issue could play a role in Nebraska and West Virginia.
"It may excite the [voter] base, but I think we're gonna have an exciting election either way," Warner said.