Defense Secretary Robert Gates says he works well with new National Security Adviser Tom Donilon. But reports suggest there has been friction between Donilon and the Pentagon in the past.
What is less clear, though, is how well he will get along with the uniformed military.
Jones is a retired commandant of the US Marine Corps and is held in high regard as a senior commander and combat veteran. Donilon has never served in the armed forces.
There’s a risk that "the White House will have lost a credible voice with the US military in losing Jones," says Andrew Exum, a fellow with Center for a New American Security and a former US Army ranger.