David Thornburgh provides us a non-partisan lens of what's at stake in the Pennsylvania primary on Tuesday, May 18th.  David is the son of the late Governor Dick Thornburgh. He hails from Western PA, knows Harrisburg intimately well and has lived in Philadelphia for the last 25 years. He runs the Committee of Seventy, a non-profit focused on civic leadership. Their work advances representative, ethical and effective government in Philadelphia and across Pennsylvania through citizen engagement.