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On Thursday, President Obama ordered a review of Justice Department procedures for leak investigations, saying he was concerned that such inquiries chilled journalists’ ability to hold the government accountable. But he made no apology for the scrutiny of the many officials whose records were searched or who had been questioned by the F.B.I.

“He makes the case that we have 18-year-olds out fighting wars and acting like adults, and we have senior administration officials quoted in stories acting like children,” said Tommy Vietor, a former National Security Council spokesman. Mr. Obama and top administration officials say some leaks put Americans at risk, disrupted intelligence operations and strained alliances.