Jamestown Associates is a political, public affairs and corporate advertising firm active in the United States, specializing in media production, direct mail, press relations and campaign management, for candidates of the Republican Party.[1] Its CEO is Larry Weitzner. Among its best-known political clients are Donald Trump (both 2016 and 2020), several governors (including Charlie Baker of Massachusetts, Chris Sununu of New Hampshire, and Chris Christie of New Jersey), Senator Mike Braun, and the Republican National Committee. Past corporate and governmental clients include Pfizer, Johnson & Johnson and the New York City Department of Environmental Protection.[2]