CA-10 elected a Democrat in 2018.

D+4.5 on 221,900 certified votes. Below: the 2018 result and this district's margin across every cycle on record.

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CA-10 — 2018 result

Source: MIT Election Data + Science Lab, US House returns (party-classified by literal ballot party).

Democratic (D)

115,945

52.3%

Republican (R)

105,955

47.7%

All others

0

0.0%

Margin

D+4.5

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Margin history

CA-10 across every cycle on record. Each year links to its district page.

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Year	Won	Margin	Votes
2024	D	+32.9%	364,544
2022	D	+78.9%	251,380
2020	D	+10.3%	302,494
2018	D	+4.5%	221,900
2016	R	−3.4%	241,141
2014	R	−12.3%	125,705
2012	R	−5.4%	209,199
2010	D	+21.0%	233,806
2008	D	+34.0%	295,165
2006	D	+32.9%	196,978
2004	D	+31.4%	278,099
2002	D	+75.6%	167,197
2000	D	+8.4%	304,819
1998	D	+10.0%	237,809
1996	D	+1.4%	283,183
1994	R	−20.7%	234,241
1992	R	−3.9%	280,429
1990	D	+25.4%	130,637
1988	D	+86.2%	165,301
1986	D	+43.8%	119,564
1984	D	+28.1%	164,177
1982	D	+29.0%	123,281
1980	D	+34.2%	164,543
1978	D	+34.3%	125,862
1976	D	+47.5%	155,443