Former Rep. Liz Cheney (R-Wyo.), a vocal critic of former President Trump, announced Wednesday she is voting for Vice President Harris.

Cheney, who sat on the House select committee that investigated the Jan. 6, 2021, attack on the U.S. Capitol, announced her decision during an appearance at Duke University, according to multiple attendees who posted on social media.

“Because we are here in North Carolina, I think it is crucially important for people to recognize, not only is what I’ve just said about the danger that Trump poses something that should prevent people from voting for him, but I don’t believe that we have the luxury of writing in candidates’ names, particularly in swing states,” Cheney said in a clip shared on the social platform X.

Cheney added that “as a conservative, as someone who believes in and cares about the Constitution, I have thought deeply about this, and because of the danger that Donald Trump poses, not only am I not voting for Donald Trump but I will be voting for Kamala Harris.”

The New York Times recently reported that per three people who know of the Wyoming Republican’s thought process, Cheney was going to give her opinion on the presidential race in September, at the start of early voting.

In recent months, Cheney has gone after former President Trump as someone who “threatens to unravel our Republic” and a person who is not “fit to serve.”

Cheney joins fellow anti-Trump Republicans such as former Rep. Adam Kinzinger (Ill.) and Georgia Lt. Gov. Geoff Duncan in public support for the vice president. 

The former president has also taken his own recent swings at Cheney, including saying back in March that she should face prosecution due to allegedly withholding evidence and testimony from the Jan. 6 committee investigation.

Story updated at 7:18 p.m. ET