2022	Democratic	5,936,852	55.3%
	Republican	4,789,340	44.7%

2018	Democratic	8,013,067	65.5%
	Republican	4,229,480	34.5%

2014	Democratic	3,810,304	54.0%
	Republican	3,249,668	46.0%

2010	Democratic	5,325,357	55.1%
	Republican	3,487,014	36.1%
	Other	847,506	8.8%

2006	Democratic	4,232,313	50.6%
	Republican	3,360,611	40.2%
	Other	768,125	9.2%

2002	Democratic	3,289,839	45.3%
	Republican	3,273,028	45.1%
	Other	695,891	9.6%

1998	Democratic	4,875,969	60.9%
	Republican	2,653,153	33.1%
	Other	476,655	6.0%

1994	Democratic	3,983,053	48.3%
	Republican	3,796,387	46.1%
	Other	463,570	5.6%

1990	Democratic	4,153,534	56.1%
	Republican	2,700,696	36.5%
	Other	547,055	7.4%

1986	Democratic	3,673,432	51.5%
	Republican	3,149,359	44.1%
	Other	312,370	4.4%

1982	Democratic	4,244,801	56.6%
	Republican	2,776,973	37.0%
	Other	479,268	6.4%

1978	Democratic	3,921,593	60.5%
	Republican	2,125,661	32.8%
	Other	436,134	6.7%

1974	Democratic	2,942,512	49.6%
	Republican	2,624,085	44.2%
	Other	366,586	6.2%

1970	Democratic	2,348,098	37.4%
	Republican	3,784,024	60.2%
	Other	149,961	2.4%

1966	Democratic	3,125,070	49.5%
	Republican	3,186,455	50.5%
	Other	991	0.0%

1962	Democratic	3,372,691	60.1%
	Republican	2,114,377	37.7%
	Other	120,129	2.1%

1958	Democratic	2,553,020	50.3%
	Republican	2,521,497	49.7%
	Other	934	0.0%

1954	Democratic	1,741,025	44.6%
	Republican	2,111,582	54.2%
	Other	46,782	1.2%

1950	Democratic	0	0.0%
	Republican	2,925,183	88.2%
	Other	390,986	11.8%

1946	Democratic	0	0.0%
	Republican	2,116,618	91.1%
	Independent	207,690	8.9%
	Other	278	0.0%

1942	Democratic	0	0.0%
	Republican	1,856,177	95.4%
	Independent	89,520	4.6%
	Other	239	0.0%

1938	Democratic	0	0.0%
	Republican	2,168,841	92.2%
	Independent	98,791	4.2%
	Other	84,006	3.6%

1934	Democratic	0	0.0%
	Republican	1,928,035	94.4%
	Independent	100,820	4.9%
	Other	13,999	0.7%

1930	Democratic	251,475	21.2%
	Republican	937,492	78.8%
	Other	23	0.0%

1926	Democratic	210,423	20.8%
	Republican	746,956	73.9%
	Independent	53,752	5.3%
	Other	10	0.0%

1922	Democratic	236,099	29.5%
	Republican	564,434	70.5%
	Other	12	0.0%

1918	Democratic	0	0.0%
	Republican	464,764	75.3%
	Independent	49,317	8.0%
	Other	103,046	16.7%

1914	Democratic	0	0.0%
	Republican	0	0.0%
	Independent	622,988	77.2%
	Other	183,842	22.8%

1910	Democratic	0	0.0%
	Republican	308,196	86.4%
	Independent	41,697	11.7%
	Other	6,926	1.9%

1906	Democratic	79,470	27.0%
	Republican	190,407	64.7%
	Independent	17,344	5.9%
	Other	6,959	2.4%

1902	Democratic	109,650	38.2%
	Republican	161,338	56.2%
	Independent	11,299	3.9%
	Other	4,932	1.7%

1898	Democratic	110,889	40.4%
	Republican	149,128	54.3%
	Independent	7,585	2.8%
	Other	7,027	2.6%

1894	Democratic	84,230	30.6%
	Republican	114,779	41.6%
	Independent	68,450	24.8%
	Other	8,225	3.0%

1890	Democratic	116,036	46.0%
	Republican	128,042	50.7%
	Independent	8,405	3.3%
	Other	41	0.0%

1886	Democratic	95,469	48.8%
	Republican	94,833	48.5%
	Independent	4,921	2.5%
	Other	222	0.1%

1882	Democratic	86,031	52.5%
	Republican	74,152	45.2%
	Other	3,703	2.3%

1879	Democratic	32,193	19.9%
	Republican	67,309	41.7%
	Independent	40,837	25.3%
	Other	21,139	13.1%

1875	Democratic	57,064	46.5%
	Republican	36,901	30.1%
	Independent	28,535	23.2%
	Other	267	0.2%

1871	Democratic	56,460	47.7%
	Republican	62,001	52.3%

1867	Democratic	48,841	52.7%
	Republican	41,887	45.2%
	Other	2,001	2.2%

1863	Democratic	43,730	40.2%
	Republican	65,039	59.8%
	Other	1	0.0%

1861	Democratic	35,186	29.5%
	Republican	51,658	43.4%
	Independent	32,239	27.1%

1859	Democratic	31,238	30.7%
	Republican	10,855	10.7%
	Independent	59,712	58.7%

1857	Democratic	57,048	61.1%
	Republican	16,398	17.6%
	Independent	19,842	21.3%
	Other	71	0.1%