2022	Democratic	6,418,119	59.7%
	Republican	4,332,602	40.3%

2018	Democratic	5,914,068	56.6%
	Republican	0	0.0%
	Other	4,543,863	43.4%

2014	Democratic	4,107,051	57.2%
	Republican	3,078,039	42.8%

2010	Democratic	4,918,158	50.1%
	Republican	3,820,977	38.9%
	Other	1,073,995	10.9%

2006	Democratic	4,189,584	49.1%
	Republican	3,845,858	45.1%
	Other	493,723	5.8%

2002	Democratic	3,658,942	49.4%
	Republican	3,094,392	41.8%
	Other	657,826	8.9%

1998	Democratic	4,290,473	52.7%
	Republican	3,161,031	38.8%
	Other	691,837	8.5%

1994	Democratic	4,441,429	52.4%
	Republican	3,412,777	40.3%
	Other	618,885	7.3%

1990	Democratic	3,874,308	51.3%
	Republican	3,186,508	42.2%
	Other	493,484	6.5%

1986	Democratic	3,957,831	53.9%
	Republican	3,118,758	42.5%
	Other	261,535	3.6%

1982	Democratic	4,001,839	52.2%
	Republican	3,381,861	44.1%
	Other	280,776	3.7%

1978	Democratic	2,928,329	43.3%
	Republican	3,493,980	51.6%
	Other	343,263	5.1%

1974	Democratic	2,986,537	49.2%
	Republican	2,812,636	46.3%
	Other	271,563	4.5%

1970	Democratic	2,718,904	42.3%
	Republican	3,521,065	54.8%
	Other	186,703	2.9%

1966	Democratic	2,578,887	40.2%
	Republican	3,834,978	59.8%
	Other	3,549	0.1%

1962	Democratic	2,957,640	51.4%
	Republican	2,793,957	48.6%
	Other	563	0.0%

1958	Democratic	2,626,626	50.9%
	Republican	2,536,396	49.1%
	Other	1,524	0.0%

1954	Democratic	1,764,035	44.7%
	Republican	2,185,918	55.3%
	Other	92	0.0%

1950	Democratic	0	0.0%
	Republican	3,089,278	99.9%
	Other	3,150	0.1%

1946	Democratic	1,137,232	43.6%
	Republican	1,470,496	56.4%
	Other	323	0.0%

1942	Democratic	1,064,660	49.7%
	Republican	1,077,408	50.3%
	Other	59	0.0%

1938	Democratic	1,296,395	50.7%
	Republican	1,139,967	44.6%
	Independent	117,083	4.6%
	Other	1,785	0.1%

1934	Democratic	1,002,832	44.6%
	Republican	1,220,515	54.3%
	Other	26,347	1.2%

1930	Democratic	403,832	30.5%
	Republican	879,597	66.4%
	Independent	41,638	3.1%
	Other	194	0.0%

1926	Democratic	204,091	18.9%
	Republican	818,519	75.8%
	Independent	56,506	5.2%
	Other	47	0.0%

1922	Democratic	232,366	26.2%
	Republican	597,349	67.3%
	Independent	58,088	6.5%
	Other	21	0.0%

1918	Democratic	259,415	39.5%
	Republican	355,247	54.1%
	Independent	42,161	6.4%
	Other	25	0.0%

1914	Democratic	223,011	25.4%
	Republican	0	0.0%
	Independent	533,255	60.8%
	Other	120,821	13.8%

1910	Democratic	153,364	41.1%
	Republican	168,145	45.1%
	Independent	45,830	12.3%
	Other	5,611	1.5%

1906	Democratic	108,493	35.9%
	Republican	133,990	44.4%
	Independent	35,187	11.7%
	Other	24,242	8.0%

1902	Democratic	129,749	43.9%
	Republican	150,039	50.8%
	Independent	10,541	3.6%
	Other	4,917	1.7%

1898	Democratic	118,921	42.4%
	Republican	146,323	52.2%
	Independent	8,784	3.1%
	Other	6,314	2.3%

1894	Democratic	98,641	35.4%
	Republican	120,309	43.2%
	Independent	48,652	17.5%
	Other	10,789	3.9%

1890	Democratic	115,783	45.9%
	Republican	126,244	50.0%
	Independent	6,878	2.7%
	Other	3,378	1.3%

1886	Democratic	92,476	47.4%
	Republican	94,969	48.7%
	Independent	5,836	3.0%
	Other	1,779	0.9%

1882	Democratic	87,944	53.5%
	Republican	71,640	43.5%
	Other	4,921	3.0%

1879	Democratic	31,226	19.4%
	Republican	67,284	41.8%
	Independent	42,404	26.3%
	Other	20,022	12.4%

1875	Democratic	58,424	47.5%
	Republican	30,932	25.2%
	Independent	33,335	27.1%
	Other	281	0.2%

1871	Democratic	56,779	47.9%
	Republican	61,699	52.1%

1867	Democratic	48,269	52.0%
	Republican	44,584	48.0%
	Other	1	0.0%

1863	Democratic	43,923	40.4%
	Republican	64,873	59.6%

1861	Democratic	34,479	28.9%
	Republican	52,593	44.0%
	Independent	32,356	27.1%

1859	Democratic	31,049	30.7%
	Republican	11,148	11.0%
	Independent	59,051	58.3%

1857	Democratic	57,336	61.1%
	Republican	16,800	17.9%
	Independent	19,718	21.0%
	Other	27	0.0%