Question: When was the political party, of which David Lewis was national secretary, founded ?

Context articles: Lega Nord Marche
John David Lewis
David Lewis (politician)
Co-operative Commonwealth Federation
New Democratic Party leadership election, 1975
Renziani
Lega Nord Trentino
Derek O'Brien (quizmaster)
Freedom Socialist Party
Jeff Mackler

Lega Nord Marche (English: "Marche Northern League") is a regionalist political party in Italy which is the "national" (hence, regional) section of Lega Nord in the Marche region.
 The current and long-time national secretary of the party is Luca Rodolfo Paolini, who served in the Chamber of Deputies from 2008 to 2013 and is now a regional councillor.
John David Lewis (March 17, 1955 – January 3, 2012) was a political scientist, historian and Objectivist scholar who held the post of visiting associate professor in the Philosophy, Politics and Economics Program at Duke University from 2008 to 2012, as well as Associate Professor of Business at the University of North Carolina at Chapel Hill.
 Lewis was also an Anthem Fellow for Objectivist Scholarship.
 Lewis received his PhD in classical studies at Cambridge University in 2001, with the dissertation, "Solon’s Polis as Kosmos: Intellectual, Moral and Political Integration in Archaic Athens".
 He taught at the University of London from 2000-2001.
 From 2001 to 2008, he was a professor in the History and Political Science Department at Ashland University, where contention surrounding his promotion to tenured professor drew national attention.
 Lewis was a member of the American Political Science Association, the Association of Ancient Historians, the Society for Military History, the American Philological Association, and the Cambridge Philological Society.
 Lewis published three books, was a contributing editor to "The Objective Standard" and contributed to "Capitalism Magazine" and contributed to multiple publications including "Journal of Business Ethics", "Social Philosophy and Policy", "Polis", "Dike", and "Bryn Mawr Classical Review".
 Lewis frequently spoke at Objectivist conferences and Tea Party events.
 He also spoke on the morality of free markets in medicine, arguing that innovators ought to be freed from unnecessary regulation.
 Lewis died on January 3, 2012 after a long battle with cancer.
 He was 56.
David Lewis, {'1': ", '2': ", '3': ", '4': "} (born David Losz; June 23, or October 1909 – May 23, 1981) 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 Canadian House of Commons, for the York South electoral district.
 While an MP, he was elected the NDP's national leader, and served from 1971 until 1975.
 After his defeat in the 1974 federal election, he stepped down as leader and retired from politics.
 He spent his last years as a university professor at Carleton University, and as a travel correspondent for the "Toronto Star".
 In retirement, he was named to the Order of Canada for his political service.
 After suffering from cancer for a long time, he died in Ottawa in 1981.
The Co-operative Commonwealth Federation (CCF) (French: "Fédération du Commonwealth Coopératif" , from 1955 the "Parti social démocratique du Canada ") was a social-democratic and democratic socialist political party in Canada.
 The CCF was founded in 1932 in Calgary, Alberta, by a number of socialist, agrarian, co-operative, and labour groups, and the League for Social Reconstruction.
 In 1944, the CCF formed the first social-democratic government in North America when it was elected to form the provincial government in Saskatchewan.
 In 1961, the CCF was succeeded by the New Democratic Party (NDP).
 The full, but little used, name of the party was Co-operative Commonwealth Federation (Farmer-Labour-Socialist).
The 1975 New Democratic Party leadership election, was held in Winnipeg, from July 4 to 7 to elect a leader of the New Democratic Party of Canada.
 David Lewis retired as federal leader, and Ed Broadbent was elected as his successor.
 Rosemary Brown made the first attempt by woman-of-colour to run for leader of a major recognized Canadian political party.
 She came in second.
 Broadbent led the NDP to its greatest electoral successes to then, including the historic 43 seats in the House of Commons in 1988.
 This convention marked the beginning of fourteen years of party unity and stability that allowed it to reach its best electoral performances of the 20th century.
Renziani, previously known as Now!
 ("Adesso!")
 and Big Bang, is a liberal and modernizing movement within the Democratic Party (PD), a political party in Italy.
 Its leader is Matteo Renzi, party's national secretary and former Prime Minister of Italy from February 2014 to December 2016.
Lega Nord Trentino (English: "Trentino Northern League", LNT) is a regionalist political party in Italy which functions as the "national" (hence, provincial) section of Lega Nord in Trentino.
 The party's current national secretary is Maurizio Fugatti, a former deputy to the Italian Parliament.
 The party has a senator, Sergio Divina, and two provincial councillors.
Derek O’Brien is an Indian politician, author, television personality, public speaker and quiz show host.
 He is a member of the Rajya Sabha (Upper House of India’s Parliament) from Bengal, representing the Trinamool Congress.
 He is national secretary and chief national spokesperson of his political party, as well leader of the Trinamool Congress’ parliamentary party in the Rajya Sabha.
The Freedom Socialist Party is a far-left socialist political party with a revolutionary feminist philosophy that emerged from a split in the United States Socialist Workers Party in 1966.
 The party views the struggles of women and minorities as part of the struggle of the working class.
 The SWP's Seattle branch, with support from individuals in other cities, split off from the SWP over what it described as the SWP's entrenched opportunism and undemocratic methods.
 The current National Secretary of the FSP is Doug Barnes.
Jeff Mackler is an American activist from San Francisco, California.
 Mackler is the national secretary of Socialist Action, a Trotskyist political party.
 He was the nominee of Socialist Action for United States Senate in 2006 and President of the United States in the 2016 election.
 In both cases, Mackler was a write-in candidate.
 His candidacy was endorsed by the Freedom Socialist Party.