Trump endorses a Cheney challenger, aiming to unseat a chief detractor.

Former President Donald J. Trump on Thursday endorsed a major challenger to Representative Liz Cheney, aiming to oust one in every of his fiercest Republican critics in a race that may take a look at whether or not his affect over the occasion’s base stays robust sufficient to finish her household’s political dynasty in Wyoming.

Mr. Trump threw his help behind Harriet Hageman, a former Republican National Committee official and a 2018 candidate for governor in Wyoming, in a bid to consolidate his supporters behind a single rival to the incumbent congresswoman.

The former president has for months taken an particularly eager curiosity in defeating Ms. Cheney within the Wyoming race subsequent yr. She voted to impeach him over his function within the Jan. 6 storming of the Capitol, and has accused him of undermining democracy along with his unwillingness to settle for the outcomes of the 2020 election.

Ms. Cheney’s outspoken criticism of Mr. Trump — a rarity in her occasion — triggered a deep rift together with her Republican colleagues within the House, and in May they eliminated her as their No. three within the convention. The daughter of former Vice President Dick Cheney, Ms. Cheney had as soon as been seen as a rising G.O.P. star, however she was changed by Representative Elise Stefanik of New York, a previously reasonable Republican who has develop into a Trump loyalist lately, within the House management.

This summer season, Mr. Trump has met with potential challengers to Ms. Cheney at his golf membership in Bedminster, N.J. Some of his advisers worry that a number of viable challengers to Ms. Cheney would fracture the opposition and permit her to survive the 2022 race.

Ms. Hageman stepped down this week from her publish as a committeewoman on the Republican National Committee.

In his assertion endorsing Ms. Hageman, Mr. Trump mentioned that she “adores the Great State of Wyoming, is strong on Crime and Borders, powerfully supports the Second Amendment, loves our Military and our Vets, and will fight for Election Integrity and Energy Independence (which Biden has already given up).”

Mr. Trump made plain his dislike of Ms. Cheney’s criticism of him within the information media, saying it was obligatory to change the Democrats’ “number one provider of sound bites, Liz Cheney.”

The endorsement drew complaints even earlier than it was official. Catharine O’Neill, who writes for the conservative web site Newsmax and was thought of one other potential candidate — and who tweeted a image of herself with Mr. Trump final month — wrote on Twitter on Wednesday: “The Republican Establishment creeps around Trump are really bad. They are pushing him to make bad decisions, because they still don’t understand why Trump won in 2016. Sad.”

Mr. Trump has introduced two upcoming rallies, in Iowa and Georgia, and has issued a spate of endorsements this month, usually taking intention at fellow Republicans who’ve crossed or displeased him.

In Michigan, he endorsed a state legislator, Steve Carra, who’s difficult Representative Fred Upton, one other Republican who voted to impeach Mr. Trump. In Washington State, he’s backing Joe Kent, a veteran working in opposition to Representative Jaime Herrera Beutler, one other Republican supporter of the previous president’s impeachment.

Ms. Cheney has been bullish about her possibilities in opposition to a pro-Trump Republican challenger. “Bring it on,” she mentioned on the “Today” present in May.