On the most recent airing of the CNN Sunday talk show, Reliable Sources, former CBS reporter, Sharyl Attkinson, revealed a rather stunning accusation about the far left online news organization, Media Matters.

Media Matters, as my understanding, is a far left blog group that I think holds itself out to be sort of an independent watchdog group. And yes, they clearly targeted me at some point. They used to work with me on stories and tried to help me produce my stories

And I was certainly friendly with them as anybody, good information can come from any source. But when I persisted with Fast and Furious and some of the green energy stories I was doing, I clearly at some point became a target… [Emphasis Added]

Of course, anyone who has read Media Matters would scoff at the idea that it is a politically “independent” media watchdog group.

Given the obvious leanings of the organization, the revelation that Media Matters is actually assisting, in some manner, in producing content for one of the “Big 3” (ABC, NBC, CBS) network news programs carries significant implications. Most notably, these three networks are still viewed by many in the public as the place to get your least politically slanted news. For many Americans, the brief 30-minute or hour long nightly news program from these networks is the only news they get all day.

In the immediate wake of Attikson’s Sunday appearance, Media Matters elected only to respond to the assertion by Attkinson that she had been targeted by the organization:

Sharyl Attkisson is continuing a pattern of evidence-free speculation that started at the end of her tenure at CBS. We have never taken contributions to target her or any other reporter. Our decision to post any research on Attkisson is based only on her shoddy reporting.

Yesterday, Media Matters doubled down on their repudiation of Attkisson’s suggestion they might have have targeted her, calling the claims “false.” Again, however, Media Matters failed to address the whole of Attkisson’s assertions.

In explaining away the targeting claims as baseless, Media Matters neglected to respond to the more subtle assertion by Attkisson that it worked with her, as she phrased it, “to help me produce my stories.”

We’ve noted here the numerous times Media Matters has unabashedly attempted to bring an end to right-leaning news outlets like Fox News, and astroturfed secondary boycott of Rush Limbaugh.

If it’s also creating content that the Big 3 network news programs are presenting as “politically neutral,” the American people have a right to know. This is especially so given the new direction Media Matters publicly announced, after declaring victory in its self-described “war on Fox News.”

According to its strategic plan for the next three years, a copy of which was provided to The Huffington Post, Media Matters envisions shifting its focus to new, increasingly influential targets, including Spanish-language media, social media streams, alternative online outlets and morning and entertainment sources. It will enhance its state media and issue-based monitoring, as well as continue its focus on right-wing radio and legacy outlets. [Emphasis Added]

Irony abounds. Media Matters, the organization that began as an effort to expose right-wing bias in media portrayed as “fair and balanced,” may now be engaging in the inverse of the very thing it sought to prevent through its cooperation with news outlets like CBS.

Media Matters needs to come clean.