Ka kammala wannan magana: Bayan barin majalisar dattijai, Cowan ya ci gaba da aikin lauya a Greensburg. Ya ci gaba da goyon bayan Jam'iyyar Democrat, kuma ya goyi bayan Horace Greeley, dan takarar Democrat da Liberal Republican ga shugaban kasa a 1872. Ya goyi bayan dan takarar shugaban kasa na Democrat Samuel J. Tilden a zaben 1876, kuma ya kasance mai goyon bayan Winfield Scott Hancock a matsayin shugaban kasa a 1880, ciki har da halartar wannan shekarar
Babban Taron Demokradiyya a matsayin wakili.