David Lewis (Canadian politician)

David Lewis was a Canadian labour lawyer and social democratic politician. He was national secretary of the Co-operative Commonwealth Federation (CCF) from 1936 to 1950 and one of the key architects of the New Democratic Party (NDP) in 1961. In 1962, he was elected as the Member of Parliament (MP), in the House of Commons of Canada, for York South. While an MP, he was elected the NDP's national leader and served from 1971 until 1975.