Michael Moore is not the only one making movies about politics. Robert Greenwald is the creator of Unprecedented: The 2000 Presidential Election, Uncovered: The Whole Truth About the Iraq War, and Unconstitutional (about civil rights erosion after 9/11), a straight-to-DVD movie trilogy exposing corruptions of democracy in the last few years. I haven't seen the first or third, but Uncovered is a thorough criticism of the administration's justifications for the war, and does not take the cheap shots that Fahrenheit 9/11 does.
Greenwald is also about to come out with a new film called Outfoxed, an expose about Fox News's political agendas. Should be an interesting to see if it has any effect on Fox's public relations, or on its reportage.