Nyorai kupfuurira kweiyi ndima - Maonero ezvematongerwe enyika aDuvall anorondedzerwa zvakasiyana-siyana seane rusununguko kana kuti anochengetedza. Iye pachake akakokwa kuRepublican President George W. Bush's inauguration muna 2001. MunaGunyana 2007, akazivisa rutsigiro rwake kumumiriri weRepublican Mutungamiri Rudy Giuliani. Duvall akashanda pasi paGOP's 2008 national convention
uye, maererano nenyaya yaAugust 29, 2008, yeMSNBC, Duvall akataura mavhidhiyo akawanda egungano racho. MunaSeptember 2008, akaonekwa pachikuva paJohn McCain  Sarah Palin rally muNew Mexico.