william leuchtenburg is here.e is a professor emeritus of history at the university of north carolina chapel hill. his new book is called "the american president." "the boston globe" calls it an "inviting triumph, the rendition of a distinguished historian, the accessibility of a popular writer." we are pleased to have bill leuchtenburg at this table. professor, welcome. william: thank you, nice to be here. jeff: much of your past has been in documenting fdr's rise and triumphs. this is a broader look at many more presidents. why this? why now? william: i was asked by the annenberg foundation if i would write a history of the american presidency. having written 14 books, almost all of which dealt with the president, you were mentioning fdr, eight books on him, it seemed like a perfect invitation to write a capstone of what i've been doing all my life. and i had earlier edited a volume of theodore roosevelt, written a book in the 1920's on the impact of franklin roosevelt and successors, all the way through barack