Roger Jason Stone Jr. (born August 27, 1952) is an American political consultant,[2] lobbyist, strategist, and conspiracy theorist noted for his use of opposition research usually for candidates of the Republican Party.[3]　　In 1980, he co-founded the Washington, DC-based lobbying firm Black, Manafort, Stone with principals Paul Manafort and Charles R. Black Jr.[4][5][6] It recruited Peter G. Kelly and the firm was renamed Black, Manafort, Stone and Kelly in 1984.[7]:124 During the 1980s, BMSK leveraged its"White House connections" to attract"high-paying clients" including"U.S. corporations","trade associations", and foreign governments. By 1990, it was"one of the leading lobbyists for American companies and foreign organizations".[7]:125　　Stone has variously been referred to in media as a"political dirty trickster," a"renowned infighter," a"seasoned practitioner of hard-edged politics," and a"veteran Republican strategist."[8][9][10][11][12][13] Over the course of his political career, Stone has been widely regarded as promoting a number of falsehoods and conspiracy theories.[22] Stone is the subject of a Netflix documentary film, titled Get Me Roger Stone, which focused on his past and role in the 2016 presidential campaign of Donald Trump.[23] Stone left the Trump campaign on August 8, 2015.