David Mark @DavidMarkDC
@cspanSusan @cspanhistory @cspan @WhiteHouseHstry Oh no. So sorry to hear this. I learned a tremendous amount from him in @cspan programs. One talk that comes to mind, from 2014, was on the 200th anniversary of the British invasion and burning of Washington, D.C. https://t.co/t0adofzTxT — PolitiTweet.org