Editing Dominant-party system (section)

===North America===
*'''{{flag|Canada}}:''' 
**'''{{flag|Alberta}}:''' 
***The [[Progressive Conservative Association of Alberta]] (often referred to [[colloquially]] as the Progressive Conservative Party of Alberta or the Alberta PC Party) formed the provincial government, without interruption, from [[1971 Alberta general election|1971]] until the party's defeat in the [[2015 Alberta general election|2015 provincial election]].<ref name="List of MLAs">{{cite web|title=List of MLAs|url=http://www.albertapc.ab.ca/admin/contentx/default.cfm?h=10383&PageId=4|work=Pc Alberta|access-date=April 18, 2013}}</ref> At 44 years, this was the longest unbroken run in government for a political party at the provincial or federal level in Canadian history.
***In 2017, the Alberta PC Party merged with Alberta's other major centre-right party, the [[Wildrose Party]], to become the [[United Conservative Party]] (UCP). The UCP has formed the provincial government since [[2019 Alberta general election|2019]], winning their second consecutive election in [[2023 Alberta general election|2023]].
**'''{{flag|Ontario}}:'''
***The [[Progressive Conservative Party of Ontario]] (known colloquially as the Ontario PC Party or simply as the "Tories") enjoyed a 43-year unbroken stretch as the party that formed the provincial government from 1943 to 1985. The party in particular was at its most powerful under the [[Red Tory]] principles of premier [[Bill Davis]] from 1971 to 1985; its dominance led the party to be nicknamed "The Big Blue Machine" during this era.
***The Ontario PC Party would regain power from 1995 to 2002 under [[Blue Toryism|Blue Tory]] premier [[Mike Harris]] and his brief successor [[Ernie Eves]], and has formed the provincial government since [[2018 Ontario general election|2018]] under [[Doug Ford]], winning elections in [[2022 Ontario general election|2022]] and [[2025 Ontario general election|2025]] as well.
*'''{{flag|Mexico}}:''' 
**The [[Institutional Revolutionary Party]] (PRI) and its predecessors Partido Nacional Revolucionario (PNR) (1929–1938) and Partido de la Revolución Mexicana (PRM) (1938–1946) in Mexico held the [[President of Mexico|presidency]] from [[1929 Mexican presidential election|1929]] to [[2000 Mexican general election|2000]]. The party governed all [[States of Mexico|states]] until 1989 and controlled both chambers of [[Congress of the Union|congress]] until 1997. As of 2023, the PRI has continued an uninterrupted hold of the governorship in one state: [[Coahuila]].
**The [[Liberal Party (Mexico)|Liberal Party]], later known as the National [[Porfirio Díaz|Porfirist]] Party, ruled consistently from 1867 to 1911. 
*'''Southern {{flag|United States}}:'''
** After [[Reconstruction era|Reconstruction]] through the [[Jim Crow era]], and until the 1990s in non-presidential elections, the South (usually defined as coextensive with the former [[Confederate States of America|Confederacy]]) was known as the "[[Solid South]]" due to its states' exceptionally reliable support of the [[Democratic Party (United States)|Democratic Party]], enabled in part by significant amounts of [[voter suppression]] and outright election subversion during Jim Crow.<ref>{{cite book |last1=Maxwell |first1=Angie |url=https://www.amazon.com/Long-Southern-Strategy-American-Politics-ebook/dp/B07RWP3D3V/ref=sr_1_1?keywords=the+long+southern+strategy&qid=1690421291&sprefix=the+long+sotuhern+%2Caps%2C107&sr=8-1 |title=The Long Southern Strategy: How Chasing White Voters in the South Changed American Politics |last2=Shields |first2=Todd |date=June 24, 2019 |publisher=Oxford University Press}}</ref><ref>{{Cite book |last1=Mickey |first1=Robert |url=https://www.amazon.com/Paths-Out-Dixie-Democratization-Authoritarian-ebook/dp/B007BOK3A0/ref=tmm_kin_swatch_0?_encoding=UTF8&qid=&sr= |title=Paths Out of Dixie: The Democratization of Authoritarian Enclaves in America's Deep South, 1944-1972 |date=February 19, 2015|publisher=Princeton University Press }}</ref><ref>{{cite web |last1=Trende |first1=Sean |title=Misunderstanding the Southern realignment |url=https://www.realclearpolitics.com/articles/2010/09/09/misunderstanding_the_southern_realignment_107084.html |website=Real Clear Politics}}</ref>