Which group advocated tha negotiation could achieve a peaceful solution to the civil war?

The group that advocated for negotiation as a means to achieve a peaceful solution to the civil war, particularly in the context of the American Civil War, included the "Peace Democrats" or "Copperheads." They believed that a negotiated settlement with the Confederacy could prevent further bloodshed and restore the Union without continuing the conflict. Their approach was often met with opposition from those who supported a more aggressive military strategy to ensure a complete victory.