That would have been leaking too. Felt was not at the witness table as far as I know. What I would have done, myself, is gone to Nixon, say he seemed to be interfering with the investigation via his toady Gray, and if he didn't stop it, and come clean, I would resign, and go public. That would have been the best thing to do. Felt did second best, because he had no desire to save Nixon from himself, is my guess. He wanted him to drown.
Is is NOT leaking when you speak to the members of the committee to which YOUR agency is reponsible to, period.
So you would have blackmailed Nixon, huh?
Have you been taking lessons from Dan Rather?