CA-40 elected a Democrat in 2016.

D+71.4 on 149,297 certified votes. Below: the 2016 result and this district's margin across every cycle on record.

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CA-40 — 2016 result

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

Democratic (D)

106,554

71.4%

Republican (R)

0

0.0%

All others

42,743

28.6%

Margin

D+71.4

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Margin history

CA-40 across every cycle on record. Each year links to its district page.

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Year	Won	Margin	Votes
2024	R	−10.5%	383,635
2022	R	−13.7%	284,311
2020	D	+45.5%	186,381
2018	D	+77.3%	121,449
2016	D	+71.4%	149,297
2014	D	+100.0%	49,379
2012	D	+100.0%	125,553
2010	R	−33.6%	178,855
2008	R	−25.1%	231,695
2006	R	−36.1%	151,289
2004	R	−35.9%	217,301
2002	R	−38.2%	136,642
2000	R	−79.9%	189,022
1998	R	−33.0%	150,125
1996	R	−35.9%	152,261
1994	R	−41.4%	163,731
1992	R	−32.0%	205,283
1990	R	−35.3%	210,386
1988	R	−37.2%	270,376
1986	R	−22.0%	200,518
1984	R	−30.4%	254,974
1982	R	−45.5%	201,600
1980	R	−48.4%	304,997
1978	R	−31.9%	224,240
1976	R	−18.5%	250,644