Many people describe James Baker as the most effective and powerful presidential chief-of-staff in modern history. David Gergen, Lesley Stahl, Hedrick Smith and others explain how Baker used compromise, negotiation and charm to help carry out the “Reagan Revolution.” Film premieres Tuesday, March 24, 2015 at 8:30 p.m. ET on PBS. Check your local listings. https://www.pbs.org/jamesbaker