Kammala wannan jumla: Power ya shiga tawagar sauyin gwamnatin Obama a karshen watan Nuwambar 2008. Ta yi aiki a matsayin Mataimaki na Musamman ga Shugaban kasa da Babban Daraktan Harkokin Multilateral da Hakkin Dan Adam a Majalisar Tsaro ta Kasa daga Janairu 2009 zuwa Fabrairun 2013. A watan Afrilun 2012, Obama ya zaɓe ta ta shugabanci sabon kwamitin da aka kafa na hana cin zarafi. A matsayin jakadan Majalisar Dinkin Duniya, ofishin Power ya mai da hankali kan batutuwa kamar gyaran Majalisar Dinkin Duniya, haƙƙin mata da haƙƙin LGBT, 'yancin addini da' yan tsiraru na addini,' yan gudun hijira, fataucin mutane, haƙƙin ɗan adam, da dimokiradiyya, gami da Gabas ta Tsakiya da Arewacin Afirka, Sudan, da Myanmar. An yi la'akari da cewa ta kasance muhimmiyar mahimmanci a cikin gwamnatin Obama a cikin shawo kan shugaban kasa don
shiga tsakani ta hanyar soja a Libya. A cikin 2016, an lasafta ta a matsayin mace ta 41 mafi iko a duniya ta "Forbes".