If Trump does manage to reinvent “the Big Lie” in service of his own corrupt ends, Cheney will at least have forced members of her party into admitting, on the record, that they are making a choice between truth and Trump’s untruth—and choosing the latter. There is no hope among her supporters and advisers that she will win the fight, when the House Republican Conference votes, likely next week, to boot her. Instead, there is a recognition that Cheney has finally decided to do what most of the Trump skeptics within the Party were reluctant to for four years: publicly challenge not only Trump’s lies but the enablers within the G.O.P. who give his lies such power. “It’s all got to do with fealty to Trump and the Big Lie and the fact that Liz is a living reproach to all these cowards,” Eric Edelman, a friend of Cheney’s who served as a national-security adviser to her father, former Vice-President Dick Cheney, told me... It took a long time, but arguably Liz Cheney today is McCain’s heir. She is, at the last, willing to call a lie a lie. She applied “the Big Lie” to Trump’s crimes against American democracy long before Trump sought, this week, to steal the phrase for his own destructive purposes. But there is one matter about which I must disagree. In a scathing opinion article she published on the Post’s Web site Wednesday night, Cheney wrote that she will not back down from this fight because it is a “turning point” for her party, which will show whether Republicans “choose truth and fidelity to the Constitution” or the “dangerous and anti-democratic Trump cult of personality.” She is wrong about this one. The choice has already been made.