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David Gergen has served as an advisor to Presidents Richard Nixon, Gerald Ford, Ronald Reagan, and Bill Clinton. He presently works as a senior political analyst for CNN and as a professor of public service at the Harvard Kennedy School. David Gergen has also served as the moderator for the Linda and Mitch Hart Lecture of ������ý's Tate Lecture Series and is the namesake for the directorship of the ������ý for Presidential History.