Lincoln was not a good impromptu speaker; he was at his best when he could read from a carefully prepared manuscript, though maybe a teleprompter could have helped that!

Here is Theodore Roosevelt with all his faults and with all his strengths - the devoted family man, the passionate game hunter, the astute politician, the frustrated warrior. This is a deeply moving account of the last years of a very great man.

The more I have studied Lincoln, the more I have followed his thought processes, the more I am convinced that he understood leadership better than any other American president.

I was able to sit at Lincoln's side and see how he thought and how he acted, and how he felt about what was going on around him. I felt the pressures that were on him. You can see what people were writing to him, how they were nudging him.

Well, it seems to me Lincoln, I suppose, is kind of a model of a particular sort of presidency, a presidency that first of all is elected by a minority of the votes.

If you think about it, the historian's task is like that of the detective.

Lincoln had no such person that he could talk with. Often, as a result, he debated with himself, and he would draw up a kind of list of the pros and cons of an argument, and carefully figure them out, and he might test them in public.