Third party (Canada)

On the federal level, since Confederation in 1867, the government has been formed alternately by the Liberal Party and the original Conservative Party and its successors, Progressive Conservative, and later, the modern Conservative Party. The first notable third party was the Progressive Party, which appeared in 1920 and had a strong showing in the 1921 elections coming second after the Liberal Party. In tune with their character as an agrarian populist party, the Progressives declaimed any interest in power for themselves, seeking instead to defend the interests of farmers against the main parties and big businesses. Though several provincial farmers' parties did form government, the Progressives under Thomas Crerar and Robert Forke refused the role of Official Opposition and worked closely with the Liberal government of the day when they held the balance of power from 1921–26. The parliamentary party had a house leader, but its decentralized nature and firm belief in the responsibility of individual MPs to carry out the will of their constituents made party discipline impossible to maintain. Tension between the conservative and radical tendencies in the party led to its demise. Following the election of 1925 the Progressive Party was effectively split between those who backed the government of Mackenzie King and those who gravitated towards JS Woodsworth and his caucus of Labour MPs. The latter coalesced into the Ginger Group and continued to serve as United Farmers or Progressives, while the conservatives largely joined the Liberal Party proper or sat in its caucus as Liberal-Progressives. Later Liberal-Progressive Premier of Manitoba John Bracken took over the leadership of the federal Conservative Party in 1942 and rechristened them the "Progressive Conservatives." This gave rise to the mistaken, but persistent belief that the two parties merged; there is no relationship between them, as the Progressive Party had ceased to exist a decade earlier.

During the Great Depression two new third parties emerged: the democratic socialist, Co-operative Commonwealth Federation (CCF), formed around the nucleus of the Ginger Group, and the right-wing, Social Credit Party of Canada, which sought reform of monetary policy. Both parties persisted for several decades with varying degrees of success. After a gradual decline Social Credit lost its remaining seats in the 1980 federal election and never recovered. The CCF was reorganized into the social democratic, New Democratic Party (NDP) in 1961 and officially aligned itself with the Canadian Labour Congress. The NDP played a significant role in both Liberal and Conservative-led minority parliaments afterwards, particularly from 1963–1968 and 1972–1974. While holding the balance of power, the New Democrats were able to achieve many long-held policy goals (universal medicare, the Canada Pension Plan, and the creation of Petro-Canada as a state-owned oil company) without forming government.

Following the 1993 federal election, the division between the "main" and the "third" parties started to break down, due to the poor showing by the Progressive Conservative Party and the rise of the Reform Party and the Quebec-based Bloc Québécois. While the Bloc could never form a government because it never contested ridings outside Quebec, the Reform Party and its successor Canadian Alliance had some modest success and eventually merged with the Progressive Conservative Party to form the new Conservative Party which formed the federal government from 2006–15.

The 2011 federal election saw a further realignment of Canadian party politics as the New Democratic Party made significant gains, allowing it to emerge as the official opposition. For the first time in Canadian history the Liberal Party was reduced to third party status. The Bloc Québécois which had been the third largest party in the House of Commons since 1997 was reduced to only four seats while a new party, the Greens made their debut in the House after winning a single seat. The New Democratic Party returned to third-party status in the federal election of 2015 and remained since.

In late 2018, Maxime Bernier, a former Conservative MP who had fallen out with the Conservative Party under Andrew Scheer's leadership after his loss in the party's 2017 leadership election, split from the party to create the People's Party. In the 2019 federal election the party failed to win any seats, as Bernier lost his own seat in Beauce and the party won 1.64% of the popular vote nationally.

In the 2019 federal election, the Bloc Québécois made a comeback by re-gaining 22 seats, thereby restoring their official party status. The New Democrats won 20 fewer seats than they had in the last federal election, leaving them with 24 seats; the Greens gained a seat in Fredericton, and held both the seat they had won in the 2019 Nanaimo–Ladysmith by-election and the seat party leader Elizabeth May had held since 2011, but still did not have enough seats to gain official party status.

A number of provinces in Canada have a two-party system (two major political parties alternate governing, though the identity of these parties may change over time). In provinces other than Quebec, these parties are typically the provincial Liberals, provincial Progressive Conservatives, the provincial NDPs, and the provincial Greens in last few years on certain provinces.

Provincial parties that may currently be considered third parties are:

• In Newfoundland and Labrador, the New Democratic Party of Newfoundland and Labrador
• In Prince Edward Island, the Prince Edward Island Liberal Party
• In Nova Scotia, the Nova Scotia New Democratic Party
• In New Brunswick, the People's Alliance of New Brunswick
• In Ontario, the Ontario Liberal Party
• In Manitoba, the Manitoba Liberal Party
• In Saskatchewan, the Saskatchewan Liberal Party†
• In Quebec, Québec solidaire
• In Yukon, the Yukon New Democratic Party
• In British Columbia, the Green Party of British Columbia
• In Alberta, the Alberta Party†

† – Based on how high their popular votes performed in each province and territorial general elections, despite the lack of gaining a seat.

In Alberta, the concept of a third party may be misleading since elections are not typically competitive between even two parties. All of Alberta's past governments formed very long political dynasties, which then disappeared, never to hold power again. In the 2015 election, the social democratic Alberta New Democratic Party won a majority government, a turn of events widely termed a "political earthquake", given Alberta's reputation as Canada's most conservative province. It was the first time Alberta was not governed by an avowedly conservative party since 1934. The outgoing Progressive Conservatives had been in power for 44 consecutive years, but were reduced to 10 seats. Defeated Premier Jim Prentice resigned his seat and retired from politics on election night, leaving the Tories as the third party for the first time since 1967. The ensuing by-election in Calgary-Foothills was won by the Official Opposition Wildrose Party. However, both parties merged into United Conservative Party and resulted in a centrist party, the Alberta Party, taking the now former Progressive Conservative place as third party until the 2019 election. Meanwhile, throughout the late 20th to early 21st centuries, the Alberta Liberal Party, which had alternated between Official Opposition and third party throughout the PC dynasty, lost all of its seats save that of David Swann. In 2019 election, however, as all other unrecognized third parties loss their remaining seats to the two major parties, spite the Alberta Party has the highest votes to assured of keep their seats, but didn't happen.

In British Columbia, the British Columbia Liberal Party was the third party from 1953 until 1991, when it eclipsed the British Columbia Social Credit Party. More recently, the Green Party of British Columbia has been considered the province's third party, finishing third in every election since 2001. The Greens captured their first seat in the legislature in 2013 when Andrew Weaver won the seat of Oak Bay-Gordon Head, the first Green win in a provincial election anywhere in Canada, and won two more seats in 2017 for Saanich North and the Islands and Cowichan Valley districts with gain Confidence and supply agreement with New Democrats as result. Several other parties have recently been the third party in the legislature. From the 1991 election, in chronological order, these were the British Columbia Social Credit Party, the Reform Party of British Columbia, the Progressive Democratic Alliance, and Democratic Reform British Columbia. Opinion polls for the last election forecast a strong showing for the British Columbia Conservative Party, which had been represented in the Legislative Assembly since a Liberal MLA crossed the floor in 2012, casting doubt on the Greens' future as British Columbia's third party. In the 2012 election, the Conservatives were shut out.

In Ontario, the Ontario New Democratic Party was for most of the province's history the province's third party until 1975 election when they became for the first time the official opposition for a brief time as the Ontario Liberal Party gained that their spot next two years and were retain unchanged until 10 years as they regain spot in 1987 election after the Ontario Progressive Conservatives loses most their seats thus becoming the third party for first as Ontario New Democrats eventually become only time majority party in their win from 1990 election until 1995 election as Progressive Conservatives got their comeback with holding majority has once again made Ontario New Democratic Party back to the third party for while. That was until 2018 election as the Liberal Party of Ontario had loss majority of all their former seats to Progressive Conservatives, New Democrats, and newly Green parties with lose their Official Party status for first time in party's 161-year history and becoming second time in their party's history of becoming third party under 10 seats other than since 1951 election.

Before the 2019 election, Prince Edward Island was only elected three third-party MLAs in its history (including one from by-election): Dr. Herb Dickieson for the PEI NDP from 1996 to 2000, Peter Bevan-Baker in 2015 for the Green Party of PEI and gain another seat for Green Party of PEI by Hannah Bell who won in 2017 Charlottetown-Parkdale by-election. The Greens had outpolled the NDP in the previous election, and Bevan-Baker, in his third campaign for the seat, won over 50% of the vote in Kellys Cross-Cumberland. In the 2019 election, however, that become its historical for the Island, as the Green Party become the new official opposition party, while the Prince Edward Island Liberal Party is become the first time in the Island political and party's history, a new third party by lose majority of their seats (11 seats) to the Greens and Progressive Conservatives.

In Nova Scotia, the mid-1990s saw the emergence of the NDP as a serious contender for government. Both Alexa McDonough and Robert Chisholm expanded the party's base beyond the labour movement and Cape Breton. The Liberals and the NDP won an equal number of seats at the 1999 election; in an unprecedented arrangement, the Speaker ruled that the two parties would split the parliamentary resources of the Official Opposition, and take turns leading the opposition in the Assembly on alternating days. This situation lasted until Liberal leader Russell MacLellan resigned from the legislature, and the party lost his seat to the governing PCs. In 2009. the NDP was elected into government, the first time an Atlantic province had voted for a party besides the Liberals or Conservatives. The Tories were relegated to the position of third party with only ten seats[1] and the Liberals formed the Official Opposition. Four years later, the NDP were heavily defeated, and reduced to third-party status once again, and Stephen McNeil became Premier.

In New Brunswick, the Green Party made a breakthrough in the 2014 election. Party leader David Coon was elected in Fredericton South, though the party secured only 6.6% of the vote compared to 13.0% for the NDP. However, in 2018 election that People's Alliance of New Brunswick has knocked out New Brunswick Greens by few hundred votes as Party leader Kris Austin was finally elected in Fredericton-Grand Lake for her third campaign in district and also gain Confidence and supply agreement with Progressive Conservative Party of New Brunswick as result.

In Quebec, polarization over the National Question made it difficult for third parties either more Quebec nationalists or not to be viable. The decline of the once-dominant Union Nationale a Quebec autonomist party and the Creditiste movement coincided with the rise of the Parti Québécois as the bulwark of Quebec nationalism, and the Parti liberal du Quebec's ideological shift to the right to consolidate the Quebec federalist vote. As support for sovereignty ebbed, other parties became important political actors. The Action démocratique du Québec, which began as a vehicle for conservative nationalist Mario Dumont, rose to Official Opposition status after the 2007 election, but lost most of its seats and fell back to third place in 2008. The party has since reorganized and rebranded itself the Coalition Avenir Québec under former PQ cabinet minister Francois Legault and eventually won in 2018 election 10 years later with 74 seats has resulted kicking Parti Quebecois into third place as well symbolically ended the province's interest of Quebec sovereigntism for while as welcoming back Quebec autonomism for first time in 52 years. The orientation of party politics around ideology rather than constitutional matters (see pour un Quebec lucide and pour un Québec solidaire) may be the beginning of a durable multiparty system and shows as of the 2018 election. In March 2019, one of the Parti Québécois MNA's has quit the party over both critical and worry the party's future, has decrease the party to 9 seats, as well resulted the Québec solidaire to become Quebec's current third party for this period.

Saskatchewan is the only province currently without any third-party representation in its legislature, since the Saskatchewan Liberal Party lost its remaining seat in the 2003 election. The Liberals had been the right-wing counterweight to the CCF/NDP from the 1930s, and after the disgraced PC Party collapsed, had returned to official opposition. This success was short-lived, as prominent Liberal MLAs and organizers joined with ex-PCs and supporters of the Reform Party of Canada to form the Saskatchewan Party as a unified centre-right alternative. Struggling to stay relevant, the Liberals nominated only 9 candidates in 2011 and finished behind the Green Party of Saskatchewan in the popular vote. Despite internal disarray, the Greens (who began as a left-wing protest group) were able to capitalize on the flagging popularity of NDP leader Dwain Lingenfelter, who led the opposition to a disastrous nine seats. The Liberals managed to rebound in 2016, nominating a full slate of candidates and more than tripling the popular vote of the Greens, but won no seats.