(CNN) - Four former White House chiefs of staff have some specific advice for the new chief of staff, Pete Rouse. I e-mailed them asking for some advice for Rouse, and quickly heard back.
Ken Duberstein, who served President Ronald Reagan, offered this: "Remember you are staff, not chief. The President is elected and you are not. Every time you speak the voice people hear is not yours but the President's. And finally, you have a constituency of one and a half, and do not tell the First Lady who is the half."
Andy Card, who served President George W. Bush, emailed me this:
1. Ethics # 1
2. Protect Article 2 for future presidents as you serve the President
3. Bring good peripheral vision to the WH debate as the President is counseled by experts with tunnel vision."
(Article 2 of the U.S. Constitution says: "The executive Power shall be vested in a President of the United States of America.")
John Podesta, who served President Bill Clinton, was terse with his email: "Kevlar."
And the outgoing chief of Staff Rahm Emanuel offered me this: "Keep your sense of humor."