His weaknesses in the stormy years of his presidency were magnified by enraged partisans of the North and South. His many talents, which in a quieter era might have gained for him a place among the great presidents, were quickly overshadowed by the cataclysmic events of civil war and by the towering Abraham Lincoln.[131]
Biographer Jean Baker is less charitable to Buchanan, saying in 2004:

Americans have conveniently misled themselves about the presidency of James Buchanan, preferring to classify him as indecisive and inactive ... In fact Buchanan's failing during the crisis over the Union was not inactivity, but rather his partiality for the South, a favoritism that bordered on disloyalty in an officer pledged to defend all the United States. He was that most dangerous of chief executives, a stubborn, mistaken ideologue whose principles held no room for compromise. His experience in government had only rendered him too self-confident to consider other views. In his betrayal of the national trust, Buchanan came closer to committing treason than any other president in American history.