From Media Matters--Fox News' War:
New video from Media Matters shows network declared "war" on the White House long before Dunn's comments.
Washington, D.C. - Following Anita Dunn's description of Fox News as an "arm" of the Republican Party, Fox News personalities have suggested or claimed that the White House declared "war" on the network. In response, Media Matters for America has released a video showing the factually inaccurate smears, blatant political organizing, and explicit lobbying that Fox News has engaged in. Many of these activities have been occurring since January 20 and have only increased in frequency as time has passed.