• Trump is expected to blast his critic, Rep. Liz Cheney, at a rally in Wyoming on Saturday.
• Trump has endorsed Harriet Hageman, an attorney running to unseat Cheney.
• The rally comes days after Trump's high-profile endorsements in Georgia flopped.

CASPER, Wyoming — Droves of supporters of former President Donald Trump are eagerly waiting for him to take the stage on Saturday afternoon at a rally where he's expected to bash Republican Rep. Liz Cheney, Wyoming's lone member of Congress who has profusely attacked Trump.

The former president is headed to Wyoming to support Harriet Hageman, an attorney who's running in the upcoming Republican primary election to unseat Cheney, a Trump ally-turned critic following the January 6 Capitol riot. She was one of 10 House Republicans who voted to impeach Trump on a charge of "incitement of insurrection" last February. 

Trump has since targeted the congresswoman and vowed to exact revenge on Republicans like Cheney who he says has betrayed him. Cheney, a staunch conservative, has stood her ground against Trump amid an onslaught of national- and state-level backlash from members of her own party.

Trump's arrival in Wyoming, his first-ever political appearance in the state, comes as the primary is just getting kicked off. Cheney officially filed for her reelection bid on Thursday. There has been no significant polling on the race yet, which takes place on August 16.

The election is widely considered as a test of Trump's influence over the Republican Party. Recently, Trump's high-profile endorsements in Georgia's primary elections failed. Trump had backed two primary challengers against incumbent Gov. Brian Kemp and Secretary of State Brad Raffensperger, both of whom had rejected Trump's pushes to overturn the 2020 election results in the battleground state. Kemp and Raffensberger each won their primary races on Wednesday by a landslide. Trump-backed candidates in Ohio and Pennsylvania did, however, did win their primary elections in recent weeks.