Henry F. Graff is a professor emeritus of history at Columbia University, where he taught his pioneering seminar on the presidency. The author of The Tuesday Cabinet and the refere...view moreHenry F. Graff is a professor emeritus of history at Columbia University, where he taught his pioneering seminar on the presidency. The author of The Tuesday Cabinet and the reference work The Presidents, he is a frequent commentator on radio and television. He lives in New York.view less