Mezue ahịrịokwu na-esonụ: Na Jenụwarị 2008, McCaskill kwadoro mgbe ahụ Senator Barack Obama na
mkpọsa ya maka nhọpụta onyeisiala site n'aka ndị Democrats, nke mere ka ọ bụrụ otu n'ime ndị Sinetọ mbụ mere nke ahụ. Ọ bụ otu n'ime ihu ndị a na-ahụ anya maka mkpọsa ya, na nkwado ya dị oke mkpa maka mmeri dị nta nke Obama na isi Missouri na February 2008. O kwuru na ọ bụ nwa ya nwaanyị bụ Maddie mere ka ya kwado Obama n'ihu ọha. A na-ekwukarị banyere ya dịka onye nwere ike ịbụ osote onye isi ala maka Obama, mana echeghị echiche nke ọma. O kwuru okwu na ụbọchị mmeghe nke Democratic National Convention na August 2008.