David Gergen on the legacy of the Presidents he's worked for and the future of the country

Washington Post opinions editor-at-large Michael Duffy speaks with David Gergen, former White House adviser to four U.S. presidents, about the leadership lessons learned from his 50-year public service career and how the best hope for the future of democracy is to prepare rising generations for lives of service and leadership, as written in his new book, “Hearts Touched with Fire: How Great Leaders Are Made.”