The show-stopping development comes as Senate Judiciary Committee Chairman Lindsey Graham, R-S.C., told Fox News that Horowitz's comprehensive report on allegations of Foreign Intelligence Surveillance Act (FISA) warrant abuse against former Trump campaign aide Carter Page will be released on Dec. 9. "That's locked," Graham said.

The new evidence concerning the altered document, which pertained to the FBI's FISA court warrant application to surveil Page, is expected to be outlined in Horowitz's upcoming report. CNN first reported the news, which was largely confirmed by The Washington Post.

But the Post, hours after publishing its story, conspicuously removed the portion of its reporting that the FBI employee involved worked "beneath" Peter Strzok, the FBI's since-fired head of counterintelligence. The Post did not offer an explanation for the change, which occurred shortly after midnight. Earlier this week, the DOJ highlighted a slew of anti-Trump text messages sent by Strzok when he was leading the Hillary Clinton email investigation and the probe into the Trump campaign.

"The person under scrutiny has not been identified but is not a high-ranking official — they worked beneath former deputy assistant director Peter Strzok, according to people familiar with the investigation who spoke on the condition of anonymity to discuss material that has not yet been made public," The Post wrote in its now-deleted paragraph.