Illustration showing Clement Vallandigham, who was exiled from the North by Lincoln. Clement Laird Vallandigham (1820 - 1871) Ohio politician and leader of the Copperhead faction of anti-war Democrats during the American Civil War. He served two terms in the United States House of Representatives. In 1863, he was convicted at an Army court martial of opposing the war, and exiled to the Confederacy. He ran for governor of Ohio in 1863 from exile in Canada, but was defeated.