A small sampling of #Walk Away Republicans:
Cindy McCain, the widow of Senator John McCain
John Kasich, the former governor of Ohio
“I’ve known Joe,” Mr. Kasich said on CNN. “I’ve known him for 30 years. I know the kind of guy he is.”
Colin Powell, the former secretary of state: Mr. Powell announced in June that he would vote for Mr. Biden. He said that Mr. Trump “lies about things”
Miles Taylor, a former chief of staff at the Department of Homeland Security: Mr. Taylor endorsed Mr. Biden, saying that the president was “actively doing damage to our security” and that what he had witnessed Mr. Trump do as chief executive “was terrifying.”
Christine Whitman, a former governor of New Jersey: Ms. Whitman was one of the few Republicans speaking at the Democratic National Convention.
Meg Whitman, the chief executive of Quibi: A former senior official for both of Mitt Romney’s presidential campaigns and a former Republican candidate for governor of California
Susan Molinari, a former congresswoman from New York: Ms. Molinari spoke at the convention, as well.
Carly Fiorina, a 2016 presidential candidate: Ms. Fiorina has said she will support Mr. Biden because he is “a person of humility and empathy and character.”
Representative Francis Rooney of Florida: Mr. Rooney has said he was considering supporting Mr. Biden partly because Mr. Trump was “driving us all crazy” and because the president’s handling of the coronavirus led to a death toll that “didn’t have to happen.”
“A lot of people that voted for President Trump did so because they did not like Hillary Clinton,” Mr. Rooney said. “I don’t see that happening with Joe Biden — how can you not like Joe Biden?”
Charlie Dent, a former congressman from Pennsylvania: Mr. Dent endorsed Mr. Biden on CNN, saying “this isn’t about right or left — for me, it’s about right and wrong.”
More than 70 top Republican national security officials: Hours before Mr. Biden accepted the Democratic nomination, the officials released a letter stating that they would be voting for Mr. Biden in November and that Mr. Trump was “unfit to lead.”
Among the signatories were former Secretary of Defense Chuck Hagel; Michael Hayden, the former C.I.A. and N.S.A. director; John Negroponte, the former director of national intelligence; and William Webster, the former director of the C.I.A. and the F.B.I.
Jeff Flake, the former senator from Arizona: Earlier this year, Mr. Flake had said that he would not be supporting Mr. Trump in November, but he is now part of a group of former Republican members of Congress who say they will be voting for Mr. Biden.
Gordon Humphrey, the former senator from New Hampshire: In 2017, Mr. Humphrey said that the president was “delusional and unfit to lead.”
John Warner, the former senator from Virginia
Former Representative Steve Bartlett of Texas
Former Representative William Clinger Jr. of Pennsylvania
Former Representative Tom Coleman of Missouri
Former Representative Charles Djou of Hawaii: Mr. Djou left the Republican Party in 2018 because, he said, Mr. Trump was taking the party in a direction he “fundamentally” disagreed with. He endorsed Mr. Biden the first morning of the Republican convention.
Mickey Edwards, a writer and a former Oklahoma congressman: In 2019, Mr. Edwards was part of a group of 19 former G.O.P. members who denounced Mr. Trump’s border wall as “unconstitutional.”
And many, many more.