Duvall's political views are variously described as libertarian or conservative. He was personally invited to Republican President George W. Bush's inauguration in 2001. In September 2007, he announced his support for Rudy Giuliani's campaign in the 2008 Republican Party presidential primaries. Duvall worked the floor at the GOP's 2008 national convention. In September 2008, he appeared onstage at a John McCain–Sarah Palin rally in New Mexico, and he endorsed Republican presidential nominee Mitt Romney in 2012. However, in 2014, Duvall said in an interview he had become an independent.
