Bartlet and Charlie in “Bad Moon Rising”

Bartlet

We won't discuss this any more for the time being. It'll be public soon enough. And the more conversations you have with me, the more lawyers you're gonna have to talk to, and they bill in an hour what you take home in a week, so we won't discuss it except to say this: you're gonna be subpoenaed. I'm confident in your loyalty to me; I'm confident in your love for me. If you lie to protect me, if you lie just once, if you lie just a little, if you lie 'cause you can't stand what's happening to me and the people making it happen, if you ever, ever lie, you're finished with me. You understand?

Charlie

Yes, sir.

Bartlet

Say you understand.

Charlie

I understand, sir.