"Hubert Humphrey, a fallen hero and a dying man, rose on rickety legs to approach the podium of the Philadelphia Convention Hall, his pulpit for the commencement address at the University of Pennsylvania. He clutched a sheaf of paper with his speech for the occasion, typed and double-spaced by an assistant from his extemporaneous dictation, and then marked up in pencil by Humphrey himself. A note on the first page, circled to draw particular attention,...