California's 10th congressional district


California's 10th congressional district is a congressional district in the U.S. state of California. Currently, the 10th district encompasses part of the northern San Joaquin Valley.
Democrat and businessman Josh Harder defeated incumbent Republican Jeff Denham in the 2018 midterms, and is the current representative for the district.
The district consists of Stanislaus County and portions of San Joaquin County. It is centered on Modesto. Cities in the district include Oakdale, Manteca, Modesto, Tracy, and Turlock.

History

Until 2012

Prior to redistricting by the California Citizens Redistricting Commission going into effect in 2012, the 10th district stretched from Livermore to Dixon and the outskirts of Vacaville. It consisted of portions of Alameda, Contra Costa, Sacramento, and Solano Counties.
The 10th district received national attention in 1996 when Democrat Ellen Tauscher defeated incumbent Republican Bill Baker.
In the 2002 redistricting of California, all seats were made safe for the parties of incumbent officeholders. The district boundaries were extended to include parts of Solano County, southwestern Sacramento County, eastern Contra Costa County and El Cerrito in western Contra Costa County. Although much of the suburban Tri-Valley region was lost to the 11th Congressional District, the city of Livermore remained in the 10th at Tauscher's request.
On June 26, 2009, Tauscher resigned her seat to be sworn in as Undersecretary of State for Arms Control and International Security. In the ensuing special election held on November 3, 2009, former Democratic Lieutenant Governor John Garamendi won the seat over Republican David Harmer 53.0% to 42.7%. Immediately following redistricting, Garamendi successfully ran for re-election in California's 3rd congressional district, which shares many municipalities with the 2002 version of the 10th district, but lies significantly northwest of the current 10th district.

2012 – present

The current 10th congressional district includes all of Stanislaus County and the southern portion of San Joaquin County.
This went into effect in 2012, as the result of redistricting by the California Citizens Redistricting Commission. The new 10th includes much of the core of the old 18th district, though the 18th also included a substantial portion of Stockton. It also shares much of the northwestern portion of the old 19th district.
Republican Jeff Denham transferred from the 19th District to the new 10th. He held it for three terms until being defeated in 2018 by Democrat Josh Harder.

Election results from statewide races

1992 – 2012

Competitiveness

Voter Registration Statistics

The California Secretary of State publishes reports on California voter registration on a regular basis. Before the 2018 primary election, they published a report dating May 21, 2018.
DateDemocraticRepublicanAmerican IndependentGreenLibertarianNo Party Preference
May 21, 2018127,878117,90010,0119592,48470,251

List of members representing the district

Election results for representatives

1912

1914

1916 (Special)

1916

1918

1920

1922

1923 (Special)

won the special election to replace fellow Republican Henry Z. Osborne, who died in office. Data for this special election is not available.

1924

1926

1928

1930

1932

1934

1936

1937 (Special)

won the special election to replace fellow Democrat Henry E. Stubbs, who died in office. Data for this special election is not available.

1938

1940

1942

1944

1946

1948

1950

1952

1954

1956

1958

1960

1962

1964

1966

1968

1970

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

2002

2004

2006

2008

2009 (Special)

2010

2012

2014

2016

2018