2022	Democratic	3,553,656	43.9%
	Republican	4,437,099	54.8%
	Other	112,153	1.4%

2018	Democratic	3,546,615	42.5%
	Republican	4,656,196	55.8%
	Other	140,632	1.7%

2014	Democratic	1,835,596	38.9%
	Republican	2,796,547	59.3%
	Other	86,125	1.8%

2010	Democratic	2,106,395	42.3%
	Republican	2,737,481	55.0%
	Other	135,994	2.7%

2006	Democratic	1,310,353	29.8%
	Republican	1,716,803	39.0%
	Independent	797,577	18.1%
	Other	574,335	13.1%

2002	Democratic	1,819,843	40.0%
	Republican	2,632,541	57.8%
	Other	101,595	2.2%

1998	Democratic	1,165,592	31.2%
	Republican	2,550,821	68.2%
	Other	21,665	0.6%

1994	Democratic	2,016,928	45.9%
	Republican	2,350,994	53.5%
	Other	28,320	0.6%

1990	Democratic	1,925,670	49.5%
	Republican	1,826,431	46.9%
	Other	140,645	3.6%

1986	Democratic	1,584,515	46.0%
	Republican	1,813,779	52.7%
	Other	43,166	1.3%

1982	Democratic	1,697,870	53.2%
	Republican	1,465,937	45.9%
	Other	27,284	0.9%

1978	Democratic	1,166,919	49.2%
	Republican	1,184,274	50.0%
	Other	18,837	0.8%

1964	Democratic	1,877,793	73.8%
	Republican	661,675	26.0%
	Other	5,257	0.2%