Although he does not provide the voice, Arnold Schwarzenegger is president of the United States rather than then-President George W. Bush because, according to Groening, "in two years ... the film be out of date". Brooks was nervous about the idea, noting that "opinion polls were way down", and has said that they "were [hoping he'd make a political comeback". The animators began by drawing an accurate caricature of Schwarzenegger, but one of the staff instead suggested an altered version of recurring character Rainier Wolfcastle as President. This idea was developed, with the design of Wolfcastle, himself also a caricature of Schwarzenegger, being given more wrinkles under his eyes and a different hairstyle.