A network that employs one contributor who repeatedly threatened to pull a “gun” on government employees and another who praised U.S. Marines for apparently urinating on dead Afghans is now hosting discredited liar Andrew Breitbart to provide political commentary. CNN anchors previously said that Breitbart lacks credibility following his use of deceptively edited video to smear former Obama administration official Shirley Sherrod as a racist.

Breitbart has appeared on CNN four times this year, including interviews with the network's hosts Dr. Drew Pinsky and Piers Morgan in panel segments during their coverage of the Iowa caucuses and the South Carolina and New Hampshire Republican primaries. Pinsky also hosted Breitbart on the January 20 edition of his show, Dr. Drew.

CNN is well aware of Breitbart's history of fabrications and his lack of credibility. After his infamous Sherrod smear unraveled, CNN's own Anderson Cooper calling his actions “a classic example of what is wrong with our national discourse.” Cooper joined a wide array of media who criticized Breitbart's tactics and pointed to what Ben Smith called his “growing credibility problem.”

As recently as last November, CNN's Don Lemon reported that a remark from President Obama had been “taken out of context” in an ad produced by Mitt Romney's campaign and commented, “for those on the right who are jumping on the lazy bandwagon, perhaps they should remember that context is everything. And there's always the videotape. Just ask Andrew Breitbart and Shirley Sherrod.”

Even Morgan has said that it is “perfectly natural to be suspicious of Mr. Breitbart” and “understandable people might be at least skeptical” of his reporting “given his track record.”

In 2010, ABC News drew widespread criticism, including from its own newsroom, after Breitbart's website reported -- and Media Matters confirmed -- that he would be providing analysis for the network during its election night coverage. ABC's George Stephanopoulos had previously called out Breitbart for pushing claims about Shirley Sherrod that were “clearly not true.” The network subsequently announced that Breitbart would “not be a part of the ABC News broadcast coverage,” but rather would be “participating in an online-only discussion and debate” for ABCNews.com. After many recriminations, with Breitbart saying he had been promised broadcast time and ABC responding that he had “exaggerated the role he would play,” ABC dropped him from its elections coverage.

Surely CNN can also find a conservative to discuss elections who hasn't had his credibility rightfully criticized by the network's own anchors.