For example -
New York Times - Top Republican National Security Officials Say They Will Vote for Biden
Four years after 50 of the nation’s most senior Republican national security officials warned that Donald J. Trump “would be the most reckless president in American history,” they are back with a new letter, declaring his presidency worse than they had imagined and urging voters to support former Vice President Joseph R. Biden Jr.
The new letter, released just hours before Mr. Biden formally accepts the nomination, lays out a 10-point indictment of Mr. Trump’s actions, accusing him of undermining the rule of law, aligning himself with dictators and engaging “in corrupt behavior that renders him unfit to serve as president.”
They also accused him of “spreading misinformation” and “undermining public health experts,” making him “unfit to lead during a national crisis.”
“When we wrote in 2016, we were warning against a vote for Donald Trump, but many of the signatories were not ready to embrace his opponent,” Hillary Clinton, the former secretary of state, noted John Bellinger, a former legal adviser at the State Department and National Security Council who was among the authors of the past and current letters. “This is different: Each of the signatories has said he or she will vote for Biden. Signatories are now even more concerned about Trump, and have fewer concerns about Biden.”