CHEYENNE, Wyo. (AP) — Former Vice President Dick Cheney, a lifelong Republican, will vote for Kamala Harris for president, he announced Friday.

Liz Cheney, who herself endorsed Harris on Wednesday, first announced her father’s endorsement when asked by Mark Leibovich of The Atlantic magazine during an onstage interview at The Texas Tribune Festival in Austin.

“Wow,” Leibovich replied as the audience cheered.

Like his daughter, Dick Cheney has been an outspoken critic of former President Donald Trump, notably during Liz Cheney’s ill-fated reelection campaign in 2022.

Dick Cheney put out a statement Friday confirming his endorsement, which read almost entirely as opposition to Trump rather than support of Harris.

“He can never be trusted with power again,” the statement said. “As citizens, we each have a duty to put country above partisanship to defend our Constitution. That is why I will be casting my vote for Vice President Kamala Harris.”

Trump responded on his Truth Social platform by calling the former vice president “an irrelevant RINO, along with his daughter.” The acronym stands for “Republican in name only.”

Asked for comment, Trump spokesperson Steven Cheung said, “Who is Liz Cheney?”

The campaign confirmed Cheung was being sarcastic by also pointing to a comment Liz Cheney posted online four years ago in which she called Harris a “radical liberal.”

Jen O’Malley Dillon, Harris’ campaign chair, released a statement saying, “The Vice President is proud to have the support of Vice President Cheney, and deeply respects his courage to put country over party.”

Dick Cheney, 83, has made few if any public appearances over the past year or more. He has dealt with heart issues since his 40s and underwent a heart transplant in 2012.

Dick Cheney’s statement Friday was similar to a 2022 campaign ad for Liz Cheney as she sought a fourth term as Wyoming’s lone congressperson. In it, he called Trump a “coward” for trying to “steal the last election using lies and violence to keep himself in power after the voters had rejected him.”

The ad did little good for his daughter in a deep-red state that once held the Cheney family dear but is now thoroughly in Trump’s corner. By a more than 2-to-1 margin, Liz Cheney lost her Republican primary to Trump-endorsed attorney Harriet Hageman.

Dick Cheney has been friends with Democrats over the years but never supported one for president.

Both Cheneys backed Trump in 2016, but after Liz Cheney criticized Trump foreign policy decisions and Trump criticized the “endless wars” in Afghanistan and Iraq launched when Dick Cheney was vice president, their support waned.

If either Cheney supported Trump in 2020, they were mum about it. Meanwhile, their home state of Wyoming that year delivered Trump his widest margin of victory.

By 2021, Liz Cheney’s vote to impeach Trump and her investigation into him for the 2021 U.S. Capitol riot made them irredeemable to Trump — and soon most of the GOP.

There were exceptions. One was Cheney ally Rep. Adam Kinzinger of Illinois, a Republican Trump critic who earlier this year endorsed Biden and spoke in support of Harris at the Democratic National Convention in August.

Several other top Republicans have come out in support of Harris while some, including Sen. Mitt Romney and former Vice President Mike Pence, say they won’t be voting for Trump.

Of them only Romney, who is not seeking reelection, is still in office.