Whakakihia te rerenga e whai ake nei: Ko nga tirohanga tōrangapū a Duvall e whakaahuatia ana hei libertarian, hei kaitiaki ranei. I karangatia ia ki te whakatuunga a te Perehitini Republican a George W. Bush i te tau 2001. I te marama o Hepetema 2007, i kii ia i tana tautoko mo te kaitono perehitini Republican a Rudy Giuliani. mahi Duvall te papa i te GOP o
2008 National Convention, a, kia rite ki te August 29, 2008, MSNBC tuhinga, Duvall kōrero te nuinga o nga ataata mo te taua hui. I te marama o Hepetema 2008, i puta ia i runga i te atamira i te huihuinga a John McCain me Sarah Palin i New Mexico.