Social Democratic Party of Sierra

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Social Democratic Party of SierraPartido Socialdemócrata de Sierra	Social Democratic Party of SierraPartido Socialdemócrata de Sierra
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Leader 	Jim Stephenson
Deputy Leader 	Jane Van Buitan
Founded 	16 September 1946
Ideology 	Social democracyAgrarianism
Political position 	Centre-left
Colour 	Red
Slogan 	On Your Side
Prefectural Assembly 	/
EnderronianParliament (SA seats) 	/
Local government 	/
The Social Democratic Party of Sierra (commonly known as the Sierra SDP or Sierra Social Democrats) is the branch of the Social Democratic Party of Enderron operating in Sierra Prefecture. The party is the one of the three major political parties in Sierran politics, the others being the Liberal Party of Sierra and the Sierra National Party. The current party leader is Jim Stephenson, since 2023. The party currently forms the Official Opposition in Sierra, having last formed government from 2012 to 2024.
The Sierra SDP largely remained in opposition from 1946 to the 1990s, only briefly forming a minority government from 1975 to 1976 under Premier Charlie Hartwell. The party won its first prefectural election in 1992. The party was a junior coalition partner with the National Party from 1998 to 2000, and with the Liberal Party from 2004 to 2008. The party has elected three governors to office: Edgardo Castaneda (1968–72), Pat Jessop (1992–96) and Colin Bartha (2016–20).
At the federal level, the Sierra SDP last won Sierra's sole seat in the Enderronian Parliament in 1994, and has not represented the prefecture since 1995.
The Social Democrats are strongest in their urban base of Los Prados, the only major urban area in Sierra, as well as some mining towns scattered throughout the prefecture.
==Party leaders==
No. 	Name 	Term began 	Term ended 	Time in office
align="centre"	Matthew Pickett 	16 September 1946	5 October 1955 	
align="centre"	Dick Corbell 	5 October 1955 	22 May 1960 	
align="centre"	Jeremy Arroyo 	22 May 1960 	30 June 1962 	
align="centre"	Harry Everest 	30 June 1962 	3 May 1970 	
align="centre"	Charlie Hartwell	3 May 1970 	19 May 1980 	
align="centre"	Pat Jessop 	19 May 1980 	11 April 1987 	
align="centre"	J. K. Fox 	11 April 1987 	19 January 1996 	
align="centre"	Daniel Ramirez 	19 January 1996 	9 September 1999	
align="centre"	Kate Wahl 	9 September 1999 	20 May 2004 	
align="centre"	Daniel Ramirez 	20 May 2004 	24 March 2005 	
align="centre"	Jamie Corbell 	24 March 2005 	16 October 2008 	
align="centre"	Steve Vanderbilt	16 October 2008 	7 March 2010 	
align="centre"	Cathy Rathburn 	7 March 2010 	10 June 2023 	
align="centre"	Jim Stephenson 	10 June 2023 	Incumbent 	
===Deputy party leaders===
#Charles Newman (1946–1951)
#Dick Corbell (1951–1955)
#Jeremy Arroyo (1955–1960)
#Paul Knox (1960–1966)
#Declan Donaldson (1966–1970)
#Joe Estrada (1970–1977)
#Pat Jessop (1977–1980)
#Kevin Wise (1980–1987)
#Vanessa Collins (1987–1991)
#Daniel Ramirez (1991–1996)
#Kevin Wise (1996–1999)
#Jamie Corbell (1999–2005)
#Steve Vanderbilt (2005–2008)
#Will Kirk (2008–2010)
#Simon Gardner (2010–2016)
#Jim Stephenson (2016–2023)
#Jane Van Buitan (2023–present)
==Election results==
===Prefectural Assembly===
Election	Seats won	± 	Total votes	% 	Position	Status 	Leader
1946 	/ 	New	 	 	2nd 	Official Opposition 	Matthew Pickett
1950 	/ 	2 	 	 	2nd 	Official Opposition 	Matthew Pickett
1952 	/ 	1 	 	 	2nd 	Official Opposition 	Matthew Pickett
1956 	/ 	1 	 	 	2nd 	Official Opposition 	Dick Corbell
1960 	/ 	1 	 	 	2nd 	Official Opposition 	Dick Corbell
1964 	/ 	3 	 	 	2nd 	Official Opposition 	Harry Everest
1968 	/ 	2 	 	 	2nd 	Official Opposition 	Harry Everest
1972 	/ 	1 	 	 	2nd 	Official Opposition 	Charlie Hartwell
1976 	/ 	2 	 	 	2nd 	Official Opposition 	Charlie Hartwell
1980 	/ 	2 	 	 	1st 	Official Opposition 	Charlie Hartwell
1984 	/ 	2 	 	 	1st 	Official Opposition 	Pat Jessop
1988 	/ 	1 	 	 	1st 	Official Opposition 	J. K. Fox
1992 	/ 	2 	 	 	1st 	Minority government 	J. K. Fox
1996 	/ 	7 	 	 	3rd 	Crossbench 	Daniel Ramirez
2000 	/ 	2 	 	 	2nd 	Official Opposition 	Kate Wahl
2004 	/ 	1 	 	 	3rd 	Coalition government(LP–SDP)	Kate Wahl
2008 	/ 	3 	 	 	2nd 	Official Opposition 	Jamie Corbell
2012 	/ 	4 	 	36.27%	1st 	Majority government 	Cathy Rathburn
2016 	/ 	3 	 	32.82%	1st 	Minority government 	Cathy Rathburn
2020 	/ 	2 	 	34.40%	1st 	Minority government 	Cathy Rathburn
2024 	/ 	3 	 	25.56%	2nd 	Official Opposition 	Jim Stephenson