From global warming to toasting a presidential candidate? Davis Guggenheim, who won an Academy Award for his documentary An Inconvenient Truth, is reportedly working on a film about Senator Barack Obama that will be shown during the Democratic National Convention in late August, according to The Huffington Post.

Guggenheim was seen accompanying Obama during his visit to Butte, Montana, on Friday afternoon. Guggenheim said only that he was traveling with his son and doing some interviews, though a tipster told a reporter the film shoot was on behalf of the Democratic National Committee and the convention. An Obama staff member later told the New York Post that "elements of what [Guggenheim] is shooting may be used," but declined to be more specific.

The Huff Post article says that Davis Guggenheim's father, Charles Guggenheim, chronicled John F. Kennedy, though IMDb shows that Charles Guggenheim won an Academy Award for Robert Kennedy: Remembered, a live action short subject that was compiled from footage that Guggenheim had shot over the years.

An Inconvenient Truth didn't move me as it did many others, but it would be interesting to see if Guggenheim could make something that would liven up the convention broadcast. No word on whether Senator John McCain has recruited any Academy Award-winning documentary filmmakers, though Variety described him as "a major movie freak" back in January 2007; he picked John Frankenheimer's The Manchurian Candidate as his favorite political film.