Harrison Arlington "Pete" Williams Jr. was an American politician and lawyer. He was a Democrat who represented New Jersey in the United States House of Representatives (1953–1957) and the United States Senate (1959–1982). Williams was convicted on May 1, 1981, for taking bribes in the Abscam sting operation, and resigned from the U.S. Senate in 1982 before a planned expulsion vote.

Abscam, sometimes written ABSCAM, was an Federal Bureau of Investigation sting operation in the late 1970s and early 1980s that led to the convictions of seven members from both chambers of the United States Congress and others for bribery and corruption. The two-year investigation initially targeted trafficking in stolen property and corruption of prominent business people, but later evolved into a corruption investigation. The FBI was aided by the United States Department of Justice and convicted scam Mel Weinberg in videotaping politicians accepting bribes from a fictitious Arabian company in return for various political favors.