- Sketch: 1 p. A drawing of an American Eagle sitting on a tree branch, looking down to its right at a snake with a man's head. The snake represents the Copperhead movement, and in particular Clement L. Vallandigham. The snake is facing a group of people who are situated underneath the eagle. This sketch means to respond to the Copperhead movement. On verso of leaf and upside down., The Copperhead Movement, composed almost entirely of Democrats, criticized Republican politicians, including President Abraham Lincoln. One of its foremost members, Clement Laird Vallandigham (1820-1871), a southern sympathizer, was a member of the U.S. House of Representatives (1857-1863), and was eventually exiled to the southern states., New-York Historical Society