The 1864–65 United States House of Representatives elections coincided with the 1864 United States presidential election, in which President Abraham Lincoln was re-elected. In the midst of the American Civil War, the opposition Democrats were deeply divided between the Copperheads, a group that demanded an immediate negotiated settlement with the Confederate States of America, and the War Democrats, who supported the war. With the Democrats lacking any coherent message, they lost half their seats to Lincoln's Republican Party, who increased their majority to a commanding level.