Photographer Stanley Tretick, best known for his iconic photos of John F. Kennedy with his children in the Oval Office, appears in the chaotic scenes as McKay reaches his victory, as part of the throng crushing around him. Tretick shot promotional stills for this and other Robert Redford films.
Groucho Marx has an uncredited walk-on cameo in what would be his last screen appearance.
A prop campaign button from this film is on display at the Smithsonian's Museum of American History in Washington. It is on display with several authentic campaign buttons.