Despite the unreliable nature of anonymous sources, the three major broadcast networks (ABC, CBS, and NBC) have used them in nearly three fifths of their news reports about the impeachment probe since it first began, mostly to pass along damning accusations against the President that cannot be independently verified.
From September 24 — the day the impeachment inquiry was announced — to October 24, these three broadcast networks devoted 322 minutes to the probe in their evening newscasts, across 140 separate news segments. Of those, more than half (82, or 57%) relied at least in part on information from anonymous sources: