As the Pennsylvania Republican Senate race tightens, David McCormick and Dr. Mehmet Oz both appeared to thank supporters at their respective election night parties but said their race would not be called Tuesday because of outstanding votes, errors on some mail-in ballots -- and, experts note, a split electorate.

"We're not going to have a resolution tonight, but we can see the path ahead," said McCormick, the former hedge fund owner whose wife worked in the Trump administration. "We can see victory ahead, and that's all because of you."

Oz, speaking minutes after McCormick, thanked former President Donald Trump for his endorsement and then, Fox News host Sean Hannity for his “behind-the-scenes” advice.

"We're not going to have a result tonight," Oz told supporters. "When all the votes are tallied, I am confident we will win."

Within the past couple of weeks, far-right conservative commentator Kathy Barnette, who marched at Trump's rally on Jan. 6, saw a surge in support in the race. Though she trailed behind on election night, her presence in the race appeared to split votes among Trump's MAGA base and away from Oz.

Gisele Fetterman, wife of Lt. Gov. John Fetterman, spoke with ABC News’ Linsey Davis after her husband’s projected win in Pennsylvania’s Democratic primary for U.S. Senate. Fetterman suffered a stroke just five days ago and underwent surgery on Election Day to get a pacemaker and defibrillator.

“It’s been a long road here and we’re grateful to celebrate together very soon,” she told Davis from an election night party in Pittsburgh. She said Tuesday's surgery was "very successful" and that her husband is "well on his way to a full recovery."

Gisele Fetterman also spoke about the role Pennsylvania will play in national politics this midterm election cycle. The state was the center of former President Donald Trump’s effort to overturn the 2020 election results after Joe Biden flipped the state from red to blue. Democrats see the race as their best shot to pick up a seat in the chamber from retiring Republican Sen. Pat Toomey.

“This is the city that can decide everything,” she said. “So it’s why it’s going to be the most watched seat in the country. And it’s critical to make this seat a blue seat.”

In North Carolina's 13th Congressional District, ABC News projects Bo Hines will win the Republican House primary.

Hines’ win is a victory for former President Donald Trump, who is testing his endorsement power in several races this midterms season. Trump also endorsed incumbent Rep. Madison Cawthorn in another North Carolina House race -- but Cawthorn conceded his loss earlier Tuesday and threw his support behind Republican State Sen. Chuck Edwards.

Hines is running in an area he has no connection to and does not live in, and many people have criticized him for using this campaign to launch his political career. His campaign finance disclosure shows that only six people from North Carolina donated money to him in the first quarter, and those same six people do not live in the district he is trying to represent.

The 26-year-old is a former college football star who played for the North Carolina State Wolfpack and Yale Bulldogs. He has said his ultimate goal is to become president.

All polls are now closed in Tuesday’s primary elections.

In Idaho, there will be a showdown between incumbent Gov. Brad Little and Lt. Gov. Janice McGeachin in the Republican gubernatorial primary. Little and McGeachin have clashed over coronavirus protocols during their administration, with McGeachin once issuing an executive order to "fix" statewide rules while Little was out of town.

In Oregon, term-limited Democratic Gov. Kate Brown’s unpopularity could open the door for Republicans to hold the governorship for the first time in more than three decades. There are 19 Republicans running for the party’s nomination on Tuesday.

President Joe Biden’s influence will be put to the test in Oregon, where Rep. Kurt Schrader is facing a challenge from progressive Jamie McLeod-Skinner in a redrawn district. Biden threw his support behind Schrader a few weeks ago, marking his first endorsement of the 2022 election season.

Returns are still coming in from Kentucky, North Carolina and Pennsylvania, with the winners of several key races already projected by ABC News.