David Gergen, who served as a presidential adviser to four presidents of both parties and educated generations of Americans about leadership and civic engagement, has died at the age of 83. CNN’s Jake Tapper reports.

The political analyst and former longtime White House adviser died in a retirement community in Lexington, Massachusetts.

David Gregen, an American political commentator who worked for four American presidents and spent decades in government, academia, and media has died at the age of 83 on Thursday.Gergen served in the administrations of Presidents Richard Nixon,