Former Rep. Liz Cheney (R-WY) hasn’t ruled out running for president this year, vowing she will do whatever is necessary to stop former President Donald Trump.

Cheney, who was once the chairwoman of the Republican Conference, is one of Trump’s fiercest detractors. While she lost a primary challenge in 2022 to a pro-Trump candidate, she has remained a prominent political figure and has left her options open to future campaigns.

“I haven’t made any decisions about it yet,” Cheney said Sunday on CNN’s State of the Union. “I’m going to do whatever is necessary to defeat Donald Trump.”

The missive came after questions about Trump’s former attorney general, Bill Barr — who resigned near the end of the former president’s term during the fallout of the 2020 presidential election — suggested that while voting for Trump’s reelection would be “Russian roulette,” a vote for President Joe Biden would be “outright national suicide.”

Cheney said that Barr was “absolutely wrong” in his comparison. Cheney, who also served as vice chairwoman of the House January 6th Committee, noted that she hasn’t endorsed anyone in the presidential race, Republican or Democrat, but would “certainly never support Donald Trump.”

“Electing Donald Trump is not Russian roulette; electing Donald Trump would mean putting in power a man who is committed to unraveling our constitutional framework. So Bill Barr is just wrong on that,” the former congresswoman said.

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The show’s host, Jake Tapper, prodded Cheney about what she would do if the race came down to being a rematch of just Biden and Trump and whether she would ultimately endorse Biden.

“I’m not going to make any announcements or endorsements this morning, but the most important thing is to defeat Donald Trump, and I’ll do whatever it takes to do that,” Cheney responded.