But many Republicans resistant to Trump believe that Cheney could rally the minority of party voters who continue to express reservations about the former president. In public polls, as many as one-fourth of Republicans and GOP-leaning independents reject Trump’s claim that the 2020 election was stolen, or criticize his efforts to overturn the result and his role in the January 6 insurrection. The share of Trump critics is usually slightly higher among Republicans holding at least a four-year college degree—a group that was notably cooler toward him during his first run to the nomination in 2016 and that sharply moved away from the GOP in the 2018 and 2020 elections. Some of those voters have since soured on President Joe Biden and the Democrats, but Cheney could spend months reminding them why they rejected Trump in the first place. “Especially among college-educated and donor-class Republicans, I think she continues to just chip away at Trump,” Kristol said.

Whit Ayres, a longtime GOP pollster, believes that the core of Republican-leaning voters hostile to Trump is smaller—only about one in 10, rather than the roughly one in five suggested by some poll questions. But he believes a Cheney candidacy could reach beyond that circle to raise doubts among a much bigger group: Republicans who are neither hard-core Trump supporters or opponents, but are focused mostly on winning in 2024. While Cheney might appeal solely to the thin sliver of die-hard Trump opponents “with a prophetic-moral case … about the importance of devotion to our democratic institutions and the US constitution,” Ayres said, that larger group might respond to “a very practical utilitarian case” that Trump has too much baggage to win a general election.

The best-case scenario for the Trump critics if Cheney runs is that her battering-ram attacks weaken him to the point that someone else can capture the nomination. As Longwell told me, even if “Liz likely cannot win a Republican primary (though anything can happen!) … she can play a significant role in helping someone else beat Trump in a Republican primary.”