A quick google reveals that Russert and his like also rely on RNC researcher for material.
Read this. Its appalling
http://www.martinlewis.com/column.pl?col=33&cat=timeExcerpt:
But the overwhelming coup of the film is the insight it brings to the Republican version of Carville's War Room - the seething boiler room at RNC headquarters in D.C. where GOP Head of Research Barbara Comstock and Deputy-Head Tim Griffin ply a rough trade that has probably cost Gore the election.
The nasty secret of the 2000 elections is undoubtedly the enormous growth in the past four years of the people who "do oppo" the nickname for the innocuously titled "Opposition Research" departments in each campaign.
That both sides maintain teams dedicated to unearthing material on the other side is not new. What IS new is the intensity of the digging, the sheer breadth and depth of the search - and most of all the now seamless and instant deployment of the results through the spin meisters directly into the mass media.
In fact, the film reveals how much the media has come to depend on the Oppo research teams for material.
Where newspaper journalists and TV producers once conducted independent research of charges made by a campaign - that has now dwindled. That is because the media has become aware that the research offered by both sides is so intensively fact-checked and triple-checked that it can safely accept the word if offered by the oppo experts.
In the film we see RNC glee as AP accepts their oppo research on a Gore misstatement during the first debate . During their months of filming BBC producers also observed producers for NBC's Tim Russert among others calling to enquire if the team had any new material. This was apparently normal trading on both sides.
RNC researcher Griffin comments in the film: "It's an amazing thing when you have topline producers and reporters calling you and saying 'we trust you.... we need your stuff.'"