Hiester Clymer (November 3, 1827 – June 12, 1884) was an American political leader from the state of Pennsylvania. Clymer was a member of the Hiester family political dynasty and the Democratic Party. He was the nephew of William Muhlenberg Hiester and the cousin of Isaac Ellmaker Hiester. Although Clymer was born in Pennsylvania, he was adamantly opposed to Abraham Lincoln's administration and the Republican Party's prosecution of the American Civil War. Elected Pennsylvania state senator in 1860, Clymer opposed state legislation that supported the state Republican Party's war effort. After the American Civil War ended, Clymer unsuccessfully ran for the Pennsylvania Governor's office in 1866 on a white supremacist platform against Union Major-General John W. Geary. After his election to t