sentences:  Clement Vallandigham, a Copperhead Democrat from Ohio, emerged as one of the most prominent critics of the war.General Ambrose Burnside arrested Vallandigham in May 1863 after the latter strongly criticized the draft and other wartime policies.A military commission subsequently sentenced Vallandigham to imprisonment until the end of the war, but Lincoln intervened to have Vallandigham released into Confederate territory.