Risen was first subpoenaed to testify on his sources for "State of War" in January 2008, but he says the campaign of harassment has continued despite a change in presidents. "I believe that the efforts to target me have continued under the Obama administration, which has been aggressively investigating whistleblowers and reporters in a way that will have a chilling effect on freedom of the press in the United States."
The second subpoena seeking Risen's testimony was issued in 2010. Risen is currently fighting subpoena number three.
The Obama administration has made its determination to crack down on leaks explicit. Last August, just after becoming Director of National Intelligence, James Clapper sent a memo to 16 different intelligence agencies about the need to stop leaks. The memo was almost immediately leaked. In November, CIA director Leon Panetta sent a message to the CIA that said leaks could "jeopardize lives" and "cannot be tolerated."
"When information about our intelligence, our people, or our operations appears in the media," said Panetta's message, "it does incredible damage to our nation's security and our ability to do our job of protecting the nation."
The four other accused leakers prosecuted by the Obama administration include National Security Agency employee Thomas Drake, charged with talking to the Baltimore Sun about electronic surveillance and wiretapping; Bradley Manning, the Army private and alleged Wikileaker of hundreds of thousands of U.S. military and State Department documents; Stephen Jin-Woo Kim, indicted for allegedly disclosing national defense information to an unnamed news organization and then lying about it; and Shamai Liebowitz, a Hebrew linguist and FBI contractor who was sentenced to 20 months in federal prison for leaking secret documents to an unnamed blogger in April 2009.