How did General George B McClellan and President Lincoln view the US Civil War?

General George B. McClellan viewed the Civil War primarily as a military conflict that required careful planning and strategy, often advocating for a cautious approach to avoid unnecessary casualties. In contrast, President Abraham Lincoln saw the war as a moral imperative to preserve the Union and abolish slavery, emphasizing the need for decisive action to achieve these goals. Their differing perspectives on the urgency and conduct of the war often led to tensions between them, particularly regarding military strategy and leadership.