David Gergen, WH adviser to 4 presidents, dead at 83

David Gergen, a longtime political advisor who served under four U.S. presidents—Richard Nixon, Gerald Ford, Ronald Reagan, and Bill Clinton— has passed away at 83 years old.

David Gergen, a longtime political advisor who served under four U.S. presidents—Richard Nixon, Gerald Ford, Ronald Reagan, and Bill Clinton— has passed away at 83 years old.