05/02/2010 05:12 am ET Updated May 25, 2011

Breitbart Confirms He Was Duped By O'Keefe And The ACORN Pimp Hoax

It turns out that Andrew Breitbart didn't actually know what was on the ACORN tapes when he helped launch them on his website last year, and used the videos to fuel his oddly personal crusade against the low-income advocacy organization.

That's right -- Breitbart didn't know what was on the tapes. Take a few seconds to let the implications of that confession sink in, and what it means to Breitbart's already dented credibility.

Recall that for months Breitbart personally vouched for the ACORN videos, braying loudly that they could not be ignored and that they represented the unvarnished truth. Breitbart claimed he had told "the truth" every step of the way about the controversial ACORN clips and bragged that "[t]hroughout the ACORN story I applied my conscience to the material."

But now it turns out that Breitbart was fooled by the ACORN pimp hoax and mistakenly assumed, after watching deceptively edited clips from his student James O'Keefe, that O'Keefe strolled into ACORN offices wearing the outlandish pimp outfit.

Now Breitbart, the chief promoter of the ACORN sting, claims he "didn't know" the truth about the tapes. Although he's quick to insist it doesn't really matter anyway.

And yes, that sound you hear is Breitbart throwing O'Keefe under the bus. Because it's O'Keefe who Breitbart now blames for the "discrepancy" regarding the pimp hoax. It's O'Keefe, who Breitbart once touted as a should-be Pulitzer Prize winner, who created the false impression that he walked into ACORN offices last summer dressed as a garish pimp.

Read the full Media Matters column here.