c) George McClellan

In the 1864 presidential election, Abraham Lincoln’s main opponent was George McClellan. A former Union general, McClellan was the Democratic candidate who advocated for a negotiated peace with the Confederacy. His platform reflected the war-weariness among certain segments of the Northern population. However, Lincoln’s military successes close to the election and his stance against slavery won him broad support, leading to his re-election. The election was significant as it took place during the Civil War and was a referendum on Lincoln’s leadership and the continuation of the war effort.