The anti-Trump Republicans who are backing Harris' 2024 campaign

Ex-Rep. Liz Cheney (R-Wyo.) will campaign alongside Vice President Kamala Harris Thursday — at an event in a Wisconsin schoolhouse known as the birthplace of the Republican party.

Why it matters: Cheney, who endorsed Harris in September, is among a growing cadre of former GOP officials and ex-Trumpworld staffers who are ditching partisan differences in an effort to prevent a second Trump presidency.

• A spokesman for the Trump campaign did not immediately respond to a request from Axios on Thursday about Cheney's campaign stop or the trend of GOP defections.

The big picture: In the home stretch of the narrowly divided race, the Harris-Walz campaign is ramping up its effort to attract Republican-leaning and undecided voters.

• Harris has said she'd appoint a Republican to her cabinet should she win in November.

Here are other former GOP officials who have endorsed the Harris-Walz ticket.

Former Vice President Dick Cheney

Former Vice President Dick Cheney, who once supported the former president, said he would vote for Harris, warning in a statement that he believed Trump "can never be trusted with power again."

• "In our nation's 248-year history, there has never been an individual who is a greater threat to our republic than Donald Trump," he said in a statement in September.
• The former vice president publicly changed his tune on Trump after the Jan. 6 attack on the U.S. Capitol.

Former Illinois Rep. Adam Kinzinger

The ex-congressman spoke at the Democratic National Convention in August, where he said the GOP has "switched its allegiance from the principles that gave it purpose to a man whose only purpose is itself."

• He told GOP voters to "vote for our bedrock values and vote for Kamala Harris."

The intrigue: He told Deadline last month he would "certainly" accept a cabinet post under Harris if offered one.

Former Arizona Sen. Jeff Flake

Flake, who served in Congress for close to two decades, said he would support the Democratic ticket earlier this week, citing his experience working with Walz in the House and Harris in the Senate.

• "I would encourage all Republicans who feel this way to do the same," he said in a post to X.

What he's saying: In a recent appearance on ABC's "This Week," Flake said he can't endorse a candidate who "tries to use the powers of the presidency to overturn" an election without mentioning Trump by name.

Former Georgia Lt. Gov. Geoff Duncan

Duncan, who opposed Trump's efforts to overturn the 2020 election, said at the DNC that Republicans who opted to vote for Harris were patriots.

• In May, he endorsed President Biden (before the president bowed out of the 2024 race), labeling Trump "a criminal defendant without a moral compass."

Ex-Trump White House officials endorse Harris

Former White House Communications Director Anthony Scaramucci and Press Secretary Stephanie Grisham have joined other members of the former administration's staff choosing not to back him in 2024.

• Scaramucci, speaking to MSNBC the night of the first debate between Harris and Trump, said "She [Harris] is the person dedicated to service — he's the person that's dedicated to self-service."
• Grisham spoke at the DNC. She told the crowd, "Kamala Harris tells the truth. She respects the American people and she has my vote."

Cassidy Hutchinson, a former Trump aide who delivered key testimony to the House Jan. 6 committee, endorsed Harris Wednesday, saying she's "really, really proud" to vote for the Democratic ticket.

• "Donald Trump and JD Vance cannot be trusted with the Constitution," she said on MSNBC. "They cannot be trusted to uphold our rule of law, and they can't be trusted to enact responsible policy."

Zoom out: Other former Trump administration and Republican officials, like former Vice President Mike Pence, have refused to endorse Trump but have stopped short of endorsing the Democratic ticket.

• The Harris campaign released an ad Thursday titled "Unstable Threat" featuring words of Trump's former allies, including Pence, deeming him unfit to serve.

Go deeper: Anti-Trump Republicans should take "extra step," vote for Harris, Cheney says