Brent Scowcroft, a Republican who served as national security adviser to former presidents Gerald Ford and George H.W. Bush, endorsed Hillary Clinton, who he said "appreciates" the importance of maintaining a "strong military advantage" while still retaining force "as a last resort."
In this photo, Ford and U.S. Secretary of State Henry Kissinger, left, are briefed by Scowcroft on the evacuation of Saigon on April 28, 1975, at the White House in Washington.
Credit: National Archives/AFP/Getty Images
Hank Paulson, who was treasury secretary under President George W. Bush, trashed Donald Trump in a Washington Post op-ed on June 24, 2016, declaring himself a #NeverTrump backer.
"With Donald Trump as the presumptive presidential nominee, we are witnessing a populist hijacking of one of the United States' great political parties," Paulson said, before saying he'll be "voting for Hillary Clinton, with the hope that she can bring Americans together to do the things necessary to strengthen our economy, our environment and our place in the world."
In this photo, Paulson attends a discussion at Johns Hopkins University's Paul H. Nitze School of Advanced International Studies on Feb. 16, 2010, in Washington.
Credit: Getty Images/Alex Wong
Richard Armitage, who was deputy secretary of state under President George W. Bush, told Politico that "if Donald Trump is the nominee, I would vote for Hillary Clinton."
"He doesn't appear to be a Republican, he doesn't appear to want to learn about issues. So, I'm going to vote for Mrs. Clinton," he said in the interview.
Mark Salter, a top adviser to Arizona Sen. John McCain during his 2008 presidential bid, tweeted that "the GOP is going to nominate for President a guy who reads the National Enquirer and thinks it's on the level."
"I'm with her," he added, referencing Hillary Clinton's campaign slogan.
Credit: AP Photo/Mary Altaffer
Tim Miller, Jeb Bush's communications director for the 2016 primary race, is a leader in the Stop Trump movement.
"Hillary would beat him from jail," Miller said during an interview with Politico. "I'm telling you. That's how unpopular he is. It's crazy."
Ben Howe, a contributing editor to the conservative RedState blog, told MSNBC in May that "as much as Hillary Clinton doesn't represent anything that I believe, as much as she's exactly the opposite of what I've been looking for in a presidential candidate, I've got to believe that she -- even if she just represented the status quo -- would be better than having a maniac in the Oval Office."
"That's what Donald Trump is," Howe said, "he's a maniac."