Rand asked the question to demonstrate that Roberts knew the name of the whistleblower and is complicit in keeping his name a secret from the public.
Everybody in D.C. already knows who it is.
This whole thing with keeping the "whistleblower's" name secret is an emperor's new clothes event. Everyone knows who he is but refuses to say. And there is no statutory requirement to do so. It's just a way for the Left to protect itself. Even Fox is in on this.
