The following figures and tables include the names of the Justices serving on the Court and Martin Quinn scores for the indicated year. Each table also includes the name of the appointing President, the President’s party affiliation and the years each Justice served on the Court. The first Justice listed is the Chief Justice of the Supreme Court.
1990

Justices serving on the Court and Martin Quinn Ideology scores, 1990
Justices serving on the Court, 1990
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
1.2 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.149 |
Reagan |
Republican |
1986-2016 |
White |
0.616 |
Kennedy |
Democrat |
1961-1993 |
Souter |
0.968 |
Bush, G.H.W |
Republican |
1990-2009 |
Blackmun |
-1.181 |
Nixon |
Republican |
1969-1994 |
Stevens |
-1.725 |
Ford |
Republican |
1975-2010 |
O’Connor |
1.142 |
Reagan |
Republican |
1981-2006 |
Marshall |
-4.322 |
Johnson |
Democrat |
1967-1991 |
Rehnquist |
2.402 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1990
Chief Justice |
Median |
Court Score |
Rehnquist |
0.916 |
0.14 |
Oregon v. Smith 494 U.S. 872 (1990)
United States v. Eichman 496 U.S. 310 (1990)
1991

Justices serving on the Court and Martin Quinn Ideology scores, 1991
Justices serving on the Court, 1991
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.85 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.511 |
Reagan |
Republican |
1986-2016 |
White |
0.634 |
Kennedy |
Democrat |
1961-1993 |
Thomas |
2.739 |
Bush, G.H.W |
Republican |
1991- |
Souter |
0.605 |
Bush, G.H.W |
Republican |
1990-2009 |
Blackmun |
-1.437 |
Nixon |
Republican |
1969-1994 |
Stevens |
-2.163 |
Ford |
Republican |
1975-2010 |
O’Connor |
0.697 |
Reagan |
Republican |
1981-2006 |
Rehnquist |
2.136 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1991
Chief Justice |
Median |
Court Score |
Rehnquist |
0.753 |
0.73 |
1992

Justices serving on the Court and Martin Quinn Ideology scores, 1992
Justices serving on the Court, 1992
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
1.033 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.555 |
Reagan |
Republican |
1986-2016 |
White |
0.581 |
Kennedy |
Democrat |
1961-1993 |
Thomas |
3.034 |
Bush, G.H.W |
Republican |
1991- |
Souter |
0.257 |
Bush, G.H.W |
Republican |
1990-2009 |
Blackmun |
-1.647 |
Nixon |
Republican |
1969-1994 |
Stevens |
-2.37 |
Ford |
Republican |
1975-2010 |
O’Connor |
0.85 |
Reagan |
Republican |
1981-2006 |
Rehnquist |
2.071 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1992
Chief Justice |
Median |
Court Score |
Rehnquist |
0.853 |
0.71 |
Freeman v. Pitts 503 U.S. 467 (1992)
Planned Parenthood v. Casey 505 U.S. 833 (1992)
R.A.V. v. St Paul 505 U.S. 377 (1992)
Ward v. Rock Against Racism 491 U.S. 781 (1992)
1993

Justices serving on the Court and Martin Quinn Ideology scores, 1993
Justices serving on the Court, 1993
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.874 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.651 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.419 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-0.235 |
Bush, G.H.W |
Republican |
1990-2009 |
Blackmun |
-1.931 |
Nixon |
Republican |
1969-1994 |
Stevens |
-2.579 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-0.211 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
1.014 |
Reagan |
Republican |
1981-2006 |
Rehnquist |
1.881 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1993
Chief Justice |
Median |
Court Score |
Rehnquist |
0.82 |
0.54 |
Church of Lukumi Babalu Aye, Inc. v. City of Hialeah 508 U.S. 520 (1993)
Shaw v. Reno 509 U.S. 630 (1993)
Wisconsin v. Mitchell 508 U.S. 476 (1993)
1994

Justices serving on the Court and Martin Quinn Ideology scores, 1994
Justices serving on the Court, 1994
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.851 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.897 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.643 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-0.336 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-3.003 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-0.451 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
0.835 |
Reagan |
Republican |
1981-2006 |
Breyer |
-0.335 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.878 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1994
Chief Justice |
Median |
Court Score |
Rehnquist |
0.735 |
0.66 |
Turner Broadcasting System, Inc v. FCC 512 U.S. 622 (1994)
1995

Justices serving on the Court and Martin Quinn Ideology scores, 1995
Justices serving on the Court, 1995
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.746 |
Reagan |
Republican |
1987-2018 |
Scalia |
3.181 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.737 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-0.38 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-3.266 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-0.532 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
0.874 |
Reagan |
Republican |
1981-2006 |
Breyer |
-0.505 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.849 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1995
Chief Justice |
Median |
Court Score |
Rehnquist |
0.689 |
0.63 |
Adarand Constructors, Inc. v. Pena 515 U.S. 200 (1995)
Hurley v. Irish GLB of Boston 515 U.S. 557 (1995)
Miller v. Johnson 515 U.S. 900 (1995)
Rosenberger v. Rector and Visitors of the University of Virginia 515 U.S. 819 (1995)
1996

Justices serving on the Court and Martin Quinn Ideology scores, 1996
Justices serving on the Court, 1996
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.84 |
Reagan |
Republican |
1987-2018 |
Scalia |
3.404 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.806 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-0.321 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-3.392 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-0.601 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
0.988 |
Reagan |
Republican |
1981-2006 |
Breyer |
-0.748 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.687 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1996
Chief Justice |
Median |
Court Score |
Rehnquist |
0.788 |
0.63 |
Bush v. Vera 517 U.S. 952 (1996)
Romer v. Evans 517 U.S. 620 (1996)
U.S. v. Virginia 518 U.S. 515 (1996)
1997

Justices serving on the Court and Martin Quinn Ideology scores, 1997
Justices serving on the Court, 1997
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.827 |
Reagan |
Republican |
1987-2018 |
Scalia |
3.48 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.793 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-0.418 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-3.361 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-0.73 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
1.102 |
Reagan |
Republican |
1981-2006 |
Breyer |
-0.779 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.67 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1997
Chief Justice |
Median |
Court Score |
Rehnquist |
0.8 |
0.62 |
Mazurek v. Armstrong 520 U.S. 968 (1997)
Reno v. American Civil Liberties Union 521 U.S. 844 (1997)
Washington v. Glucksberg 521 U.S. 702 (1997)
1998

Justices serving on the Court and Martin Quinn Ideology scores, 1998
Justices serving on the Court, 1998
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.953 |
Reagan |
Republican |
1987-2018 |
Scalia |
3.455 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.819 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-0.484 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-3.379 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-0.796 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
1.003 |
Reagan |
Republican |
1981-2006 |
Breyer |
-0.747 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.884 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1998
Chief Justice |
Median |
Court Score |
Rehnquist |
0.863 |
0.63 |
Hustler Magazine v. Falwell 485 U.S. 46 (1998)
National Endowment for the Arts v. Finley 524 U.S. 569 (1998)
1999

Justices serving on the Court and Martin Quinn Ideology scores, 1999
Justices serving on the Court, 1999
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
1.092 |
Reagan |
Republican |
1987-2018 |
Scalia |
3.537 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.772 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-0.934 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-3.319 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.25 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
0.891 |
Reagan |
Republican |
1981-2006 |
Breyer |
-0.781 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.747 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 1999
Chief Justice |
Median |
Court Score |
Rehnquist |
0.85 |
0.53 |
Saenz v. Roe 526 U.S. 489 (1999)
2001

Justices serving on the Court and Martin Quinn Ideology scores, 2001
Justices serving on the Court, 2001
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
1.059 |
Reagan |
Republican |
1987-2018 |
Scalia |
3.382 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.767 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-1.397 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-3.036 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.616 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
0.372 |
Reagan |
Republican |
1981-2006 |
Breyer |
-1.303 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.428 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 2001
Chief Justice |
Median |
Court Score |
Rehnquist |
0.371 |
0.30 |
United States v. Emerson 270 F.3d 203 (2001)
2002

Justices serving on the Court and Martin Quinn Ideology scores, 2002
Justices serving on the Court, 2002
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.902 |
Reagan |
Republican |
1987-2018 |
Scalia |
3.091 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.898 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-1.514 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-2.924 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.683 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
0.263 |
Reagan |
Republican |
1981-2006 |
Breyer |
-1.309 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.262 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 2002
Chief Justice |
Median |
Court Score |
Rehnquist |
0.262 |
0.22 |
Republican Party of Minnesota v. White 536 U.S. 765 (2002)
Watchtower v. Stratton 536 U.S. 150 (2002)
Zelman v. Simmons-Harris 536 U.S. 639 (2002)
2003

Justices serving on the Court and Martin Quinn Ideology scores, 2003
Justices serving on the Court, 2003
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.771 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.927 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.92 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-1.66 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-2.914 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.754 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
0.224 |
Reagan |
Republican |
1981-2006 |
Breyer |
-1.23 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.396 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 2003
Chief Justice |
Median |
Court Score |
Rehnquist |
0.222 |
0.19 |
FEC v. Beaumont 539 U.S. 146 (2003)
Gratz v. Bollinger 539 U.S. 244 (2003)
Grutter v. Bollinger 539 U.S. 306 (2003)
Lawrence v. Texas 539 U.S. 558 (2003)
Virginia v. Black 538 U.S. 343 (2003)
2004

Justices serving on the Court and Martin Quinn Ideology scores, 2004
Justices serving on the Court, 2004
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.541 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.727 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.966 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-1.613 |
Bush, G.H.W |
Republican |
1990-2009 |
Stevens |
-2.909 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.683 |
Clinton |
Democrat |
1993-2020 |
O’Connor |
0.12 |
Reagan |
Republican |
1981-2006 |
Breyer |
-1.067 |
Clinton |
Democrat |
1994-2022 |
Rehnquist |
1.459 |
Nixon |
Republican |
1971-2005 |
Chief Justice, 2004
Chief Justice |
Median |
Court Score |
Rehnquist |
0.111 |
0.17 |
2005

Justices serving on the Court and Martin Quinn Ideology scores, 2005
Justices serving on the Court, 2005
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.501 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.636 |
Reagan |
Republican |
1986-2016 |
Thomas |
4.002 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-1.526 |
Bush, G.H.W |
Republican |
1990-2009 |
Roberts |
1.396 |
Bush, G.W |
Republican |
2005- |
Stevens |
-2.858 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.572 |
Clinton |
Democrat |
1993-2020 |
Alito |
1.429 |
Bush, G.W |
Republican |
2005- |
O’Connor |
0.072 |
Reagan |
Republican |
1981-2006 |
Breyer |
-1.236 |
Clinton |
Democrat |
1994-2022 |
Chief Justice, 2005
Chief Justice |
Median |
Court Score |
Roberts (a) |
0.044 |
0.28 |
Roberts (b) |
0.499 |
|
McCreary County v. ACLU of Kentucky et al. 545 U.S. 844 (2005)
Van Orden v. Perry 545 U.S. 677 (2005)
2006

Justices serving on the Court and Martin Quinn Ideology scores, 2006
Justices serving on the Court, 2006
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.461 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.608 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.976 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-1.422 |
Bush, G.H.W |
Republican |
1990-2009 |
Roberts |
1.428 |
Bush, G.W |
Republican |
2005- |
Stevens |
-2.817 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.684 |
Clinton |
Democrat |
1993-2020 |
Alito |
1.465 |
Bush, G.W |
Republican |
2005- |
Breyer |
-1.368 |
Clinton |
Democrat |
1994-2022 |
Chief Justice, 2006
Chief Justice |
Median |
Court Score |
Roberts |
0.461 |
0.29 |
Donald H. Rumsfeld, Secretary of Defense, et al. v. Forum for Academic and Institutional Rights et al. 547 U.S. 47 (2006)
2007

Justices serving on the Court and Martin Quinn Ideology scores, 2007
Justices serving on the Court, 2007
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.412 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.458 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.842 |
Bush, G.H.W |
Republican |
1991- |
Souter |
-1.495 |
Bush, G.H.W |
Republican |
1990-2009 |
Roberts |
1.418 |
Bush, G.W |
Republican |
2005- |
Stevens |
-2.691 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.673 |
Clinton |
Democrat |
1993-2020 |
Alito |
1.559 |
Bush, G.W |
Republican |
2005- |
Breyer |
-1.279 |
Clinton |
Democrat |
1994-2022 |
Chief Justice, 2007
Chief Justice |
Median |
Court Score |
Roberts |
0.412 |
0.28 |
Morse v. Frederick 551 U.S. 393 (2007)
Parents Involved in Community Schools v. Seattle School District No. 1 551 U.S. 701 (2007)
2008

Justices serving on the Court and Martin Quinn Ideology scores, 2008
Justices serving on the Court, 2008
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.522 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.312 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.494 |
Bush, G.H.W |
Republican |
1991- |
Roberts |
1.394 |
Bush, G.W |
Republican |
2005- |
Stevens |
-2.862 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.67 |
Clinton |
Democrat |
1993-2020 |
Alito |
1.855 |
Bush, G.W |
Republican |
2005- |
Breyer |
-1.321 |
Clinton |
Democrat |
1994-2022 |
Sotomayor |
-1.592 |
Obama |
Democrat |
2008- |
Chief Justice, 2008
Chief Justice |
Median |
Court Score |
Roberts |
0.579 |
0.24 |
Crawford v. Marion County Election Board et al Indiana Democratic Party, et al v. Todd Rokita, Indiana Secretary of State, et al 553 U.S. 181 (2008)
District of Columbia v. Heller 554 U.S. 570 (2008)
2009

Justices serving on the Court and Martin Quinn Ideology scores, 2009
Justices serving on the Court, 2009
Justice |
Mean |
President |
Party of President |
Years Served |
Kennedy |
0.522 |
Reagan |
Republican |
1987-2018 |
Scalia |
2.312 |
Reagan |
Republican |
1986-2016 |
Thomas |
3.494 |
Bush, G.H.W |
Republican |
1991- |
Roberts |
1.394 |
Bush, G.W |
Republican |
2005- |
Stevens |
-2.862 |
Ford |
Republican |
1975-2010 |
Ginsburg |
-1.67 |
Clinton |
Democrat |
1993-2020 |
Alito |
1.855 |
Bush, G.W |
Republican |
2005- |
Breyer |
-1.321 |
Clinton |
Democrat |
1994-2022 |
Sotomayor |
-1.592 |
Obama |
Democrat |
2008- |
Chief Justice, 2009
Chief Justice |
Median |
Court Score |
Roberts |
0.522 |
0.24 |
Pleasant Grove City v. Summum 555 U.S. 460 (2009)