If Abraham Lincoln was known as the Great Emancipator, he was also the only president to suspend the writ of habeas corpus. Indeed, Lincoln's record on the Constitution and individual rights has fueled a century of debate, from charges that Democrats were singled out for harrassment to Gore Vidal's depiction of Lincoln as an "absolute dictator." Now, in The Fate of Liberty, one of America's leading authorities on Lincoln wades straight into this controversy,...