George B. McClellan
George B. McClellan was a Union commander during the American Civil War and commanded the armies in 1862 especially. He was cautious and criticized for being slow. Despite his battlefield ineffectiveness, he was instrumental in organizing the Army of the Potomac into a coherent fighting force. He was fired twice by President Abraham Lincoln. Later, while the war was still occurring, McClellan ran on the Democratic platform against Lincoln in the 1864 Presidential election. He lost to Lincoln under a huge majority.