Republican leaders forged an agreement this week to potentially fund a challenger to Rep. Liz Cheney in Wyoming, and party members are expected to formally condemn her for her work on the Jan. 6 committee Friday, an unprecedented rebuke of an incumbent member of Congress.

As the party met in Salt Lake City this week, the leaders of the Wyoming GOP privately signed a special letter that would allow the national party to financially support Harriet Hageman, Cheney’s primary challenger. The letter officially recognizes Hageman as the presumptive nominee for the seat.

In response to the party passing the “Rule 11” resolution that could fund Cheney’s challenger, a spokesman for Cheney said: “Wyoming Party Chairman Frank Eathorne and the Republican National Committee are trying to assert their will and take away the voice of the people of Wyoming before a single vote has even been cast.”

Republican National Committee chairwoman Ronna McDaniel also worked behind the scenes with David Bossie, a top Trump ally, to author and push a resolution that attacked Cheney’s work on the committee, called her a “destructive” force in the GOP and vowed the party would no longer support her.