At the beginning of the Civil War, President Abraham Lincoln and his highest-ranking general, George B. McClellan, agreed that the United States must preserve the Union. Their differing strategies for accomplishing that goal, however, created constant conflict. In Lincoln and McClellan at War, Chester G. Hearn explores this troubled relationship, revealing its complexity and showing clearly why the two men -- both inexperienced with war -- eventually parted ways. A staunch Democrat who never lost his acrimony toward Republicans -- including the president -- McClellan first observed Lincoln...