Thomas Drake, a former senior executive of the NSA and eventual whistleblower, had a chilling warning when he appeared on CBS's Face the Nation Sunday. Drake was targeted for espionage by the U.S. government for revealing the data collection practices of the NSA after 9/11. And he warns future whistle-blowers that in the post-Edward Snowden era, "national security trumps the Constitution."

Whistle-blowing now is extraordinarily dangerous. It ends up, your First Amendment rights are criminalized in this country if you expose, especially, national security related matters. That somehow the imprimatur of national security trumps the Constitution - it trumps the rule of law and it trumps what I believe most Americans would believe is reasonable expectation of privacy. Even Justice Sotomayor in 2012, in her opinion, said that we have to revisit this expectation of no privacy simply because we provide data to a third party.