Ka kammala wannan jumla:
yakin neman zaben shugaban kasa a watan Maris na 2007 a matsayin darektan sadarwa na Obama na Iowa. Bayan nasarar da Obama ya samu a Iowa, Earnest ya yi aiki a matsayin babban mataimakin sadarwa a cikin gasa da dama da suka hada da South Carolina, Texas da Pennsylvania. A lokacin babban zaben 2008, Earnest ya yi aiki a matsayin mataimakin darektan sadarwa na kamfen. Bayan da aka zabi Obama a matsayin shugaban kasa, Earnest ya koma Washington, DC kuma ya yi aiki a matsayin darektan sadarwa na kwamitin zartarwa na shugaban kasa.