After leaving the Senate , Cowan resumed practicing law in Greensburg . He continued to support the Democratic Party , and supported Horace Greeley , the Democratic and Liberal Republican nominee for president in 1872 . He supported the presidential candidacy of Democrat Samuel J. Tilden in the election of 1876 , and was a supporter of Winfield Scott Hancock for president in 1880 , including attending that year 's Democratic National Convention as a delegate
Democratic National Convention
1880 Democratic National Convention
Edgar Cowan