Tuhia he tomokanga mo tenei irava - I te whakakore i te tūranga o te Kaabinet, i whakawhiwhia a Hanna ki te hainatanga hei seneta mai i Ohio i muri i te whakatu a Sherman hei Hekeretari o te Kawanatanga; i whiriwhiria ano ia e te Ohio General Assembly i te 1898 me te 1904. I muri i te kohurutanga o McKinley
I te tau 1901, i mahi a Senator Hanna mo te hanganga o te awaawa i Panama, kaua i tetahi atu wahi i Amerika Waenganui, i whakaarohia i mua. I mate ia i te tau 1904, ka maumahara ki a ia mo tana mahi i te pooti a McKinley, na nga pakiwaituhi mohoao na nga kaiwhakaahua penei i a Homer Davenport, nana nei ia i whakaari hei rangatira torangapu o McKinley.