Tonight’s big news will be the fate of Representative Liz Cheney, whose latter-day conversion from dedicated Republican partisan to Donald Trump’s chief inquisitor in Congress has been one of the most compelling storylines of the last 18 months.

In just a few hours, we should know whether Cheney is able to retain her seat as Wyoming’s lone House member while helping investigate her own party’s leader — or whether her decision to do so has made her anathema to Republican base voters.

Surveys show Cheney well behind her primary opponent, a Trump supporter named Harriet Hageman, even though she has vastly outraised and outspent her challenger thanks to her much louder national megaphone. But it’s precisely her fame that has probably doomed Cheney with Trump’s core voters, who see her as an apostate and a traitor to their cause.

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