JACKSON, Wyo. — Representative Liz Cheney of Wyoming conceded defeat to Harriet Hageman in her Republican primary on Tuesday, handing Donald J. Trump his most prized trophy yet in his long campaign to purge the Republican Party of his critics.
Ms. Hageman, a lawyer in Cheyenne, was lifted by Mr. Trump’s endorsement in her race against Ms. Cheney, the daughter of a former vice-president and former member of the House Republican leadership.
Ms. Cheney’s loss was as anticipated as it was consequential. The leading Republican voice against Mr. Trump, and vice chairwoman of the committee investigating the Jan. 6 Capitol attack, next year will no longer have her perch in Congress from which to battle a figure she believes poses a grave threat to American democracy.
The repudiation of Ms….