Remember where you came from.
Preserve the President's options. He may need them.
Be able to resign. It will improve your value to the President and do wonders for your performance.
Make decisions about the President's personal security. He can overrule you, but don't ask him to be the one to counsel caution.
Don't blame the boss. He has enough problems.
The implication that there was something wrong with the war plan is amusing.