In one scene, playing on a TV in the background is Billy Crystal dressed as a turkey and Robert De Niro as a pilgrim. The clip is from a post-9/11 commercial to boost New York tourism directed by Barry Levinson. In the ad, the two squabble about their costumes as participants on a Macy's Thanksgiving parade float. Crystal tries to persuade De Niro to trade outfits with him, at one point being reduced to parodying the latter actor's famous line from Taxi Driver (1976): "Are you gobbling at me? Are you gobbling at me?"
President Kellogg and Senator Mills' names are based on the names of the cereal companies, Kellogg and General Mills.
Robin Williams based his performance on a combination of his own stand up routine and Jay Leno's.
In one scene, Robin Williams says something to the effect of going on a date with "Rachel Tensions." "Rachel Tensions" was the role RuPaul had in To Wong Foo Thanks for Everything, Julie Newmar (1995). Robin Williams played "John Jacob Jingleheimer Schmidt" in the film.
When Laura Linney goes to get changed, from the front office as she leaves you can see a picture of a deer. The deer is positioned the exact same way in the poster for The Deer Hunter (1978) in which Christopher Walken starred.
In the scene where Robin Williams goes into the laundromat to vote, the name of the facility is named 'Papas', the same name of the character Robin Williams played in House of D (2004).
Universal originally canceled the release of the DVD in Germany, following complaints about a very poor quality of the dubbing. Nonetheless, after discussions about the Clinton vs Obama US democratic party presidential campaign reached high ratings in Germany, the DVD was at last released in spring 2008.
In a campaign discussion, Dobbs says to his helpers "Alison, Jenny, what do you think?" This is a reference to Allison Janney who starred in "The West Wing" (1999).
Christopher Walken's character, Jack Menken, mentions having worked with elephants in the circus when he was a kid. The summer he was 16 years old, Christopher Walken had a job as part of the lion-taming act of a traveling circus.
Howard Stern was originally casted for the lead role, but turned it down claiming that he was too busy launching his new show.