Robert Dallek, an historian, is a member of the organization: Historians for Obama. He is also the author of "Nixon and Kissinger: Partners in Power." His other books include "Hail to the Chief: The Making and Unmaking of American Presidents" and "An Unfinished Life: John F. Kennedy, 1917-1963" "Flawed Giant: Lyndon Johnson and His Times 1961-1973."