Martha Raddatz is an American reporter with ABC News. She is the network's Chief Global Affairs Correspondent reporting for ABC's World News Tonight with David Muir, Nightline, and other network broadcasts. In addition to her work for ABC News, Raddatz has written for The New Republic and is a frequent guest on PBS's Washington Week. Raddatz is the co-anchor and primary fill-in anchor on This Week with George Stephanopoulos.