2022	Democratic	3,106,313	40.0%
	Republican	4,614,210	59.4%
	Other	50,876	0.7%

2018	Democratic	4,043,723	49.2%
	Republican	4,076,186	49.6%
	Other	100,652	1.2%

2014	Democratic	2,801,198	47.1%
	Republican	2,865,343	48.1%
	Other	285,020	4.8%

2010	Democratic	2,557,785	47.7%
	Republican	2,619,335	48.9%
	Other	182,615	3.4%

2006	Democratic	2,178,289	45.1%
	Republican	2,519,845	52.2%
	Other	131,136	2.7%

2002	Democratic	2,201,427	43.2%
	Republican	2,856,845	56.0%
	Other	42,309	0.8%

1998	Democratic	1,773,054	44.7%
	Republican	2,191,105	55.3%
	Other	282	0.0%

1994	Democratic	2,135,008	50.8%
	Republican	2,071,068	49.2%
	Other	583	0.0%

1990	Democratic	1,995,206	56.5%
	Republican	1,535,068	43.5%
	Other	597	0.0%

1986	Democratic	1,538,620	45.4%
	Republican	1,847,525	54.6%
	Other	26	0.0%

1982	Democratic	1,739,553	64.7%
	Republican	949,013	35.3%

1978	Democratic	1,406,580	55.6%
	Republican	1,123,888	44.4%

1974	Democratic	1,118,954	61.2%
	Republican	709,438	38.8%

1970	Democratic	984,305	56.9%
	Republican	746,243	43.1%
	Other	265	0.0%

1966	Democratic	668,233	44.9%
	Republican	821,190	55.1%
	Other	238	0.0%

1964	Democratic	933,554	56.1%
	Republican	686,297	41.3%
	Other	43,630	2.6%

1960	Democratic	849,407	59.8%
	Republican	569,936	40.2%

1956	Democratic	747,753	73.7%
	Republican	266,980	26.3%

1954	Democratic	287,769	80.5%
	Republican	69,852	19.5%

1952	Democratic	624,463	74.8%
	Republican	210,009	25.2%

1916	Democratic	30,343	36.6%
	Republican	10,333	12.5%
	Other	42,209	50.9%

1912	Democratic	38,971	80.5%
	Republican	2,646	5.5%
	Independent	2,314	4.8%
	Other	4,468	9.2%