Marie Elizabeth Harf (born June 15, 1981) is a liberal political commentator for the Fox News Channel and former deputy campaign manager for policy and communications for the Rep. Seth Moulton (D-Mass.) presidential campaign. She served as the Senior advisor of Strategic Communications to U.S. Secretary of State John Kerry at the United States Department of State, leading the Iran nuclear negotiations communications strategy. Harf also was Acting Spokesperson and Deputy Spokesperson of the State Department.