Cheney's defeat by Harriet Hageman marks a significant victory for the former president in his campaign to oust Republicans who backed impeaching him after a mob of his supporters stormed the Capitol building last year.

In conceding the race, Cheney said she was not willing "go along with President Trump's lie about the 2020 election" to win a primary.

"It would have required that I enable his ongoing efforts to unravel our democratic system and attack the foundations of our republic. That was a path I could not and would not take," she told a gathering of her supporters.

The fate of U.S. Senator Lisa Murkowski of Alaska, who also voted in favor of impeachment and is facing off against another Trump-backed candidate on Tuesday, remains unclear.

The polls for that primary, a nonpartisan format in which the top four vote-getters advance to the general election, have not yet closed.

With 37% of the expected ballots counted, Hageman led the Republican field with 59% of the vote, followed by Cheney with 36%, according to Edison Research.

Both Wyoming and Alaska are reliably Republican, making it unlikely that either's result will influence whether President Joe Biden's Democrats lose their razor-thin majorities in Congress.

Republicans are expected to retake the House and also have a chance of winning control of the Senate.

The ousting of Cheney is nevertheless the latest sign of Trump's enduring sway over the Republican Party.

Trump, who has hinted that he will run for president in 2024, made ending Cheney's congressional career a priority among the 10 House Republicans targeted for supporting his impeachment in 2021.

Cheney, the daughter of Republican former Vice President Dick Cheney, says Trump is a threat to democracy. She has used her position on the congressional committee investigating the Jan. 6 attack to keep attention on Trump's actions around the Capitol riot, and his false claims that he won the 2020 election.

Cheney, in the House, voted to impeach Trump on a charge of inciting the Capitol riot, while Murkowski, in the Senate, voted to convict him on that charge. Trump was ultimately acquitted.

Original Story By | Liliana Salgado and Nathan Layne