Former congresswoman Liz Cheney of Wyoming is the poster child of a Republican establishment abandoned by the party’s far-right base. Now, she’s billboarding what may come next: In an interview with CBS aired Sunday, Cheney lamented the extent to which the Republican Party had been “co-opted” by Trumpism and said she feared the potential of a vengeful Trump presidency in 2025. “One of the things that we see happening today is a sort of a sleepwalking into dictatorship in the United States,” Cheney said. Cheney’s refusal to accept former president Donald Trump’s false claims that the 2020 election had been...