In that case... The person who leaked Plame's name was a "whistleblower."
Look, you can be a whistleblower with classified information. You just must blow the whistle to those with clearance to hear the information.
Since Democrats were informed of this NSA program, they were the ones responsible for blowing the whistle on its legality. They said nothing because they felt it was not in violation of any law.
By leaking this to the public, the entire country is in jeopardy. That is not whistleblowing, that is treason.