FBI doesn’t comment on extant investigations. Therefore the media can make up any damned thing they want and run with it.
Ok, and partially to in an effort to gain the upper hand for the next election.
So, Comey says, “We’ve got this Russian document. If it leaks out we will look bad on the Clinton investigation. We have to do something!”
“But, Chief, it’s a Russian document. Who cares?”
“You don’t understand, it’s a FAKE Russian document!”
“Oh. Then that IS serious.”