Justice Department statement casts scrutiny on 'anonymous allegations'

The directive comes as details continue to emerge about the Russia investigation

"Americans should be skeptical about anonymous allegations," it continues. "The Department of Justice has a long-established policy to neither confirm nor deny such allegations.”

"The FBI leak of information regarding the president is outrageous, inexcusable and illegal," the statement in response to the Washington Post story read.

In an appearance before the Senate Appropriations Committee Tuesday, Rosenstein promised Mueller would have "full independence" as he conducted his investigation.

In a series of tweets Thursday, Trump referred to the idea of an obstruction of justice probe as a "phony story" and a "witch hunt."

Comey himself described the "challenge" of journalists writing about confidential information during testimony before the Senate Intelligence Committee last week, saying, "the people talking about it often don't really know what's going on and those of us who know what's been on are not talking about it and we don't call the press to say, 'Hey, you got that thing wrong about the sensitive topic.'"