How did copperheads impact the war?

Copperheads, a faction of Northern Democrats who opposed the Civil War, significantly impacted the war by promoting peace negotiations and criticizing the Lincoln administration's strategies. Their anti-war sentiment created divisions within the Democratic Party and weakened Northern resolve, leading to tensions in public opinion. Copperheads organized protests and called for an end to hostilities, which influenced some voters and politicians, ultimately complicating the Union's war efforts. Their activities highlighted the contentious political landscape in the North and underscored the challenges Lincoln faced in maintaining support for the war.