Karzai Copying Obama on Whistleblowing?

Whatever will the United States say and do about the expulsion of New York Times' reporter Matthew Rosenberg from Afghanistan? Would Rosenberg be prosecuted by the Justice Department as a "leaker" if he refused to reveal his Afghan sources on a story about an American coup plot? The Times' James Risen, for example, is facing prison time for refusing to divulge his sources in a story about the CIA and an Iran nuclear controversy.