Robert Linlithgow "Bob" Livingston Jr. (born April 30, 1943) is a Washington, D.C.-based lobbyist and a former Republican U.S. Representative from Louisiana. He was Chairman of the Appropriations Committee from 1995–1999, and he was chosen as Newt Gingrich's successor as Speaker of the United States House of Representatives late in 1998 but chose to withdraw and retire after an extramarital affair was discovered.