2020	Democratic	2,541,238	57.2%
	Republican	1,817,090	40.9%
	Other	85,402	1.9%

2018	Democratic	1,711,654	54.0%
	Republican	1,357,355	42.8%
	Other	102,408	3.2%

2014	Democratic	1,043,866	55.8%
	Republican	791,297	42.3%
	Other	34,372	1.8%

2012	Democratic	1,985,783	58.8%
	Republican	1,329,405	39.4%
	Other	59,480	1.8%

2008	Democratic	1,951,218	56.0%
	Republican	1,461,025	42.0%
	Other	70,202	2.0%

2006	Democratic	1,200,843	53.4%
	Republican	997,775	44.3%
	Other	51,452	2.3%

2002	Democratic	1,138,193	53.9%
	Republican	928,439	43.9%
	Other	45,972	2.2%

2000	Democratic	1,511,237	50.1%
	Republican	1,420,267	47.1%
	Other	84,158	2.8%

1996	Democratic	1,519,328	52.7%
	Republican	1,227,817	42.6%
	Other	136,961	4.7%

1994	Democratic	1,033,487	50.3%
	Republican	966,244	47.0%
	Other	55,156	2.7%

1990	Democratic	977,810	50.4%
	Republican	918,874	47.4%
	Other	41,770	2.2%

1988	Democratic	1,599,905	53.6%
	Republican	1,349,937	45.2%
	Other	37,792	1.3%

1984	Democratic	1,986,644	64.2%
	Republican	1,080,100	34.9%
	Other	29,712	1.0%

1982	Democratic	1,117,549	50.9%
	Republican	1,047,626	47.8%
	Other	28,770	1.3%

1978	Democratic	1,082,960	55.3%
	Republican	844,200	43.1%
	Other	30,355	1.6%

1976	Democratic	1,681,140	60.7%
	Republican	1,054,505	38.0%
	Other	35,742	1.3%

1972	Democratic	963,573	34.5%
	Republican	1,743,854	62.5%
	Other	84,480	3.0%

1970	Democratic	1,157,074	54.0%
	Republican	903,026	42.2%
	Independent	58,992	2.8%
	Other	23,013	1.1%

1966	Democratic	788,021	37.0%
	Republican	1,278,843	60.0%
	Other	63,824	3.0%

1964	Democratic	1,677,515	61.9%
	Republican	1,011,280	37.3%
	Other	20,780	0.8%

1960	Democratic	1,151,385	43.2%
	Republican	1,483,832	55.7%
	Other	29,339	1.1%

1958	Democratic	966,832	51.4%
	Republican	882,287	46.9%
	Other	32,210	1.7%

1954	Democratic	858,158	48.5%
	Republican	861,528	48.7%
	Other	50,871	2.9%

1952	Democratic	1,011,187	43.6%
	Republican	1,286,782	55.5%
	Other	20,263	0.9%

1936	Democratic	916,414	54.9%
	Republican	740,088	44.3%
	Other	12,789	0.8%

1934	Democratic	785,971	57.9%
	Republican	554,483	40.8%
	Other	16,955	1.2%

1930	Democratic	401,007	39.0%
	Republican	601,497	58.5%
	Other	25,719	2.5%

1928	Democratic	608,623	41.8%
	Republican	841,752	57.9%
	Other	4,252	0.3%