David Corn, the liberal journalist who obtained the videotape of Mitt Romney’s damaging remarks at a closed-door fundraiser, says the unnamed source is a fan of his work.

“He’s told me he read my books and he was familiar with the earlier Bain stories that I had done, which were investigative, and he was impressed by that,” the Washington bureau chief of Mother Jones told me in a video interview. Corn is the author of such books as The Lies of George W. Bush.

Pressed about the source’s motivation, Corn, who is also an MSNBC commentator, says: “My guess is—I haven’t asked—is that he’s left of center.” Romney’s comments, that 47 percent of Americans are dependent on government, have an entitlement mentality and that he views them as victims—have erupted into the middle of the presidential campaign.

Read more at the Daily Beast