In the past ten days, the news channel has run more than 30 segments calling for the nonprofit group to be stripped of its tax-exempt status. Its Fox Nation website has even provided a link to pre-completed complaint forms against Media Matters to send to the Internal Revenue Service.

While Fox News personalities like Glenn Beck and Bill O’Reilly have long grumbled about Media Matters, this attack on the group has been carried out across the channel’s news and opinion programs. It has included shows like “The O’Reilly Factor,” news coverage of the complaints to the IRS, and even a psychological profile of Brock, a former conservative journalist who went over to the liberal side, on “Fox and Friends” that suggested he might be “full of self-hatred” because he was adopted.

“Media Matters is not a media investigative organization,” said Fox News contributor and Washington Post columnist Charles Krauthammer on a “Special Report with Bret Baier” last week. “It’s a war on Fox. And you’re allowed to do that in a democracy. You can be as nasty as you want. The only thing is, don’t ask for a government subsidy.”