Brent Scowcroft, national security adviser under Republican presidents Gerald Ford and George H.W. Bush, endorsed Hillary Clinton for president on Wednesday.
"Secretary Clinton shares my belief that America must remain the world’s indispensable leader," Scowcroft said in a statement, touting her experience as secretary of state. "She understands that our leadership and engagement beyond our borders makes the world, and therefore the United States, more secure and prosperous. She appreciates that it is essential to maintain our strong military advantage, but that force must only be used as a last resort."