"It's a stunning thing, to see a publication you would see in a dentist's office, so lacking in truth and fact," he told the Washington Post.
The D'Souza article is built around the notion that Mr. Obama is channeling his father's views. "This philandering, inebriated African socialist, who raged against the world for denying him the realization of his anticolonial ambitions, is now setting the nation's agenda through the reincarnation of his dreams in his son," D'Souza writes.
He makes these claims despite the fact that the president's father abandoned his family when Mr. Obama was two years old. Father and son only met one time after that, when the president was ten years old, and Mr. Obama was critical of his father in his memoir.
Gibbs was scheduled to meet today with Forbes's Washington bureau chief over the story, according to the Post. "Did they not fact-check this at all, or did they fact-check it and just willfully ignore it?" he said.
Both Forbes and D'Souza are standing by the article, which D'Souza describes as putting forth a "psychological theory."
Former GOP House speaker Newt Gingrich hasas illustrating the fact that the president operates out of out of a "Kenyan, anti-colonial" worldview. That comment prompted Gibbs to speculate earlier this week that Gingrich, a potential 2012 presidential candidate, was "trying to appeal to the fringe of people who don't think the president was born in this country."
Brian Montopoli is a political reporter for CBSNews.com. You can read more of his posts here. Follow Hotsheet on Facebook and Twitter.