Maybe he blackmailed everyone using NSA data...
Maybe he blackmailed everyone using NSA data...
Even if he didn't, it's only a question of time until the NSA starts blackmailing everyone with NSA data.
If so, either he was persuaded by evidence of its effectiveness in preventing terrorist attacks on the US, or maybe he was persuaded by evidence of its effectiveness after being shown his last 10 years of internet searches, presented on a CD, lying next to the duplicate sitting in an envelope marked "To the Editor, New York Times".
For the record I'm not saying clapper was in the right or that he shouldn't face charges, but in a country where sanctioned torture is the norm why should unpunished perjury by an official from a spy agency be shocking?