Whakaotihia te rerenga e whai ake nei: I muri i tana wehenga mai i te Rōpū Kaunihera, ka hoki a Cowan ki te mahi ture i Greensburg. I haere tonu ia ki te tautoko i te Pāti Manapori, me te tautoko i a Horace Greeley, te kaitono Manapori me te Manapori Republican mo te perehitini i te tau 1872. I tautoko ia i te kaitono perehitini o te Democrat Samuel J. Tilden i te pooti o te tau 1876, a he kaitautoko ia mo Winfield Scott Hancock mo te perehitini i te tau 1880, tae atu ki te haere ki te huihuinga o taua tau.
He mema ki te Democratic National Convention.