WASHINGTON — Former Rep. Liz Cheney, Republican of Wyoming, on Wednesday endorsed Vice President Kamala Harris for president, the latest high-profile show of support from Republicans to Democrats.

Cheney made his comments during an appearance at Duke University’s Sanford School of Public Policy.

“Because of the danger that Donald Trump poses, not only will I not vote for Donald Trump, I will vote for Kamala Harris,” Cheney said in a video of remarks posted on X. The university separately provided a clip of Cheney’s comments to NBC News.

The former congresswoman said in her speech that it is “critically important” that people understand that people “don’t have the luxury of writing down candidates’ names, especially in swing states.”

Cheney previously served as Republican House Majority Leader before being ousted for her criticism of former President Donald Trump. Cheney has also said that Trump would seek to remain in office for more than four years if elected to a second term. In the same interview on NBC’s “TODAY” show with host Savannah Guthrie, Cheney said she would “never vote for Donald Trump, and I will do everything in my power to make sure that Donald Trump is defeated in 2024.”

Ohio Sen. J.D. Vance, the Republican vice presidential nominee, criticized Cheney during a moderated discussion at an event hosted by the conservative group Turning Point Action on Wednesday night.

“One very positive thing I can say about the next presidency of Donald J. Trump is that he is going to make sure that people like Liz Cheney are laughed out of the White House instead of rewarded,” Vance told moderator Charlie Kirk.

In August, Harris’ campaign unveiled more than two dozen endorsements from Republicans, including many politicians who have openly opposed Trump’s candidacy.

Former Rep. Adam Kinzinger, who served on the Jan. 6 committee with Cheney, has also endorsed Harris. He had backed President Joe Biden when he was in the race. Kinzinger spoke at the Democratic National Convention, where he said Trump had “strangled the soul” of the GOP.

In 2022, Cheney was voted out of the Republican primary by a Trump-backed challenger. She was first elected to the House of Representatives in 2016.