Roger Jason Stone is an American political assistant and lobbyist. He is most well known for the Robert Mueller special counsel investigation, and his involvement with and connections to Russian interference in the 2016 U.S. presidential election as a political consultant for the 2016 campaign of 45th and 47th U.S. president Donald Trump.
Since the 1970s, Stone has worked on the campaigns of Republican politicians, including Richard Nixon, Ronald Reagan, Jack Kemp, Bob Dole, George W. Bush, and Trump. In addition to frequently serving as a campaign adviser, Stone was a political lobbyist. In 1980, he co-founded a Washington, D.C.–based lobbying firm with Paul Manafort and Charles R. Black Jr. The firm recruited Peter G. Kelly and was renamed Black, Manafort, Stone and Kelly in 1984. During the 1980s, BMSK became a top lobbying firm by leveraging its White House connections to attract high-paying clients, including U.S. corporations and trade associations, as well as foreign governments. By 1990, it was one of the leading lobbyists for American companies and foreign organizations.