Cheney overwhelmingly alienated members after refusing to tamper her criticisms of the former president in the weeks and months following the insurrection — unlike the then-leader of the caucus, Kevin McCarthy, who quickly returned to Trump’s side after initially condemning him for his role in the riot. Cheney became the top Republican on the House committee that investigated the Jan. 6 attack. In 2022, she lost in the primary for her Wyoming seat.

Cheney has since written a book that details the groundwork laid by members of her party — including new House Speaker Mike Johnson — that led to the events of Jan. 6. “Oath and Honor: A Memoir and a Warning” is to be released Tuesday.

In an excerpt of the interview that aired Saturday, Cheney called the Louisiana Republican a “collaborator” in Trump’s attempt to overturn the results of the 2020 election. In the full interview Sunday, Cheney warned against sending the little-known Republican back to the role in 2025.

“What happens if Mike Johnson is the Speaker on the 6th of January 2025?,” CBS’ John Dickerson asked.

“He can’t be,” Cheney replied. “We are facing a situation with respect to the 2024 election where it’s an existential crisis and we have to ensure that we don’t have a situation where an election that might be thrown into the House of Representatives is overseen by a Republican majority.”