Cika wannan jumla: Baya ga gudummawar siyasa a tsawon shekaru, Buffett ya amince kuma ya ba da gudummawar kamfen na Barack Obama
yakin neman zaben shugaban kasa. A ranar 2 ga Yuli, 2008, Buffett ya halarci $ 28,500 a kowace farantin tara kuɗi don yakin neman zaben Obama a Chicago. Buffett ya nuna cewa ra'ayoyin John McCain game da adalci na zamantakewa sun yi nisa da nasa cewa McCain zai buƙaci "lobotomy" don Buffett ya canza goyon bayansa. A lokacin muhawara ta biyu ta zaben shugaban Amurka na 2008, McCain da Obama, bayan da mai shiga tsakani na muhawara na shugaban kasa Tom Brokaw ya fara tambayar su, duka sun ambaci Buffett a matsayin yiwuwar sakataren baitulmalin gaba. Daga baya, a cikin muhawara ta uku da ta karshe ta shugaban kasa, Obama ya ambaci Buffett a matsayin mai ba da shawara kan harkokin tattalin arziki. Buffett ya kuma kasance mai ba da shawara kan harkokin kudi ga dan takarar Republican Arnold Schwarzenegger a lokacin zaben gwamnan California na 2003.