Although Barack Obama has often referred to his Christian faith, only one-third of Americans identified the U.S. president as a Christian in a recent poll. Reuters

As the presidential election season heats up, President Obama's half-brother may inadvertently become his biggest detractor.

George Obama, who lives in a hut in Nairobi, Kenya, will be featured in 2016: Obama's America, a new anti-Obama documentary by the conservative author and tedious flame-fanner Dinesh D'Souza.

The film, set to be released this summer, is based on D'Souza's bestselling book, The Roots of Obama's Rage, in which the author asserts that the president is motivated by a rage against Western dominance inherited by his African father.

A video clip of the film posted by the Hollywood Reporter shows D'Souza and George Obama talking amicably on a park bench, with the filmmaker curious as to why the leader of the free world's brother lives like something out of 'Slumdog Millionaire.'

If you are his brother, has he been your keeper? the filmmaker asks.

Go ask him, George replies, apparently irritated by D'Souza's intimation that the president has a responsibility for his welfare. I think he has a family of his own. I'm a member of his family, but I'm over-age, so I help myself.

The 30-year-old George, handsome and affable on screen, is the youngest of seven children that Barack Obama Sr. had fathered with four wives. D'Souza referred to him as the black sheep of the Obama family. He's particularly interesting, D'Souza said. He lives in rubble on a few dollars a day while his powerful, multimillionaire brother doesn't lift a finger to help him.

The filmmaker did not say whether he believed Obama's Republican challenger, Mitt Romney, should attempt to gain voter favor by offering to let George live in one of his six homes.

D'Souza's film is being produced by Gerald Molen, an Oscar-winning producer who frequently collaborates with Steven Spielberg, a longtime Democrat. Habitually low-key when it comes to his political preferences, the producer more recently has described himself as an independent who leans conservative, although he claims that disagreeing with his friends in liberal-leaning Hollywood has never been a problem. Nevertheless, he and D'Souza are clearly hoping to influence the upcoming election with 2016: Obama's America. The film's name was conjured up out of D'Souza's desire to demonstrate what American would look like should the president win a second term.

At a screening of the film earlier this year, D'Souza warned the audience that an Obama victory would mean that the president won't be tethered to public opinion, he won't have to run for re-election again, and he will be truly, in a sense, a free man in the White House to do what he wants.

The Indian-born D'Souza worked as a policy analyst for the Regan White House before turning to professional punditry. The author of several right-leaning books, he often makes appearances on Hannity, The Colbert Reporter and Politically Incorrect.

The latest Gallup polls have Obama and Romney tied at 46 percent.

2016: Obama's America opens nationally in limited release on July 27, after a Houston premiere this week and invitation-only screenings in Los Angeles next week.