“We’re not going to subpoena reporters in the future. We don’t need to. We know who you’re talking to.”

What’s behind the administration’s fervor isn’t clear, but the news media have largely rolled over and yawned. A big reason is that prosecutors aren’t hassling reporters as they once did. Thanks to the post-9/11 explosion in government intercepts, electronic surveillance, and data capture of all imaginable kinds — the NSA is estimated to have intercepted 15-20 trillion communications in the past decade — the secrecy police have vast new ways to identify leakers.

So they no longer have to force journalists to expose confidential sources. As a national security representative told Lucy Dalglish, director of the Reporters Committee for Freedom of the Press, “We’re not going to subpoena reporters in the future. We don’t need to. We know who you’re talking to.”