Dhameystir weedha soo socota: Ka dib markii uu ka tagay Aqalka Senate-ka, Cowan wuxuu dib u bilaabay ku shaqeynta sharciga Greensburg. Wuxuu sii waday inuu taageero Xisbiga Dimuqraadiga, wuxuuna taageeray Horace Greeley, musharaxa Dimuqraadiga iyo Liberal Republican ee madaxweynaha 1872. Wuxuu taageeray musharaxnimadii madaxweynenimada ee Dimuqraadiga Samuel J. Tilden doorashadii 1876, wuxuuna taageero u ahaa Winfield Scott Hancock madaxweynaha 1880, oo ay ku jirto ka qeybgalka sannadkaas
Madasha Qaranka ee Xisbiga Dimuqraadiga oo wakiil ka ah.