2018	Democratic	380,166	37.1%
	Republican	644,293	62.9%

2014	Democratic	320,862	38.5%
	Republican	512,679	61.5%

2010	Democratic	0	0.0%
	Republican	674,573	99.6%
	Other	2,570	0.4%

2006	Democratic	267,270	32.7%
	Republican	514,583	63.0%
	Other	34,681	4.2%

2002	Democratic	342,525	42.6%
	Republican	460,795	57.4%

1998	Democratic	430,541	59.3%
	Republican	295,683	40.7%

1994	Democratic	469,564	58.6%
	Republican	331,489	41.4%

1990	Democratic	373,804	49.7%
	Republican	378,552	50.3%

1986	Democratic	245,626	30.9%
	Republican	548,580	69.1%

1982	Democratic	0	0.0%
	Republican	576,659	86.9%
	Other	86,935	13.1%

1978	Democratic	0	0.0%
	Republican	555,089	86.5%
	Other	86,407	13.5%

1974	Democratic	266,520	36.5%
	Republican	440,026	60.3%
	Other	22,868	3.1%

1972	Democratic	275,661	34.0%
	Republican	505,302	62.4%
	Other	28,682	3.5%

1970	Democratic	264,883	40.0%
	Republican	378,244	57.1%
	Other	19,576	3.0%

1968	Democratic	289,631	37.8%
	Republican	458,406	59.9%
	Other	17,787	2.3%

1966	Democratic	255,764	41.5%
	Republican	350,699	56.8%
	Other	10,567	1.7%

1964	Democratic	357,196	46.2%
	Republican	403,466	52.2%
	Other	12,877	1.7%

1962	Democratic	251,175	42.8%
	Republican	335,557	57.2%
	Other	2	0.0%

1960	Democratic	370,912	44.4%
	Republican	464,192	55.6%

1958	Democratic	315,959	48.8%
	Republican	331,952	51.2%

1956	Democratic	346,798	44.3%
	Republican	418,420	53.4%
	Other	18,358	2.3%

1954	Democratic	239,695	41.6%
	Republican	324,585	56.4%
	Other	11,726	2.0%

1952	Democratic	310,471	39.0%
	Republican	468,056	58.9%
	Other	16,773	2.1%

1950	Democratic	234,901	41.3%
	Republican	320,105	56.2%
	Other	14,096	2.5%

1914	Democratic	169,357	36.3%
	Republican	193,738	41.5%
	Independent	59,906	12.8%
	Other	43,297	9.3%

1912	Democratic	151,898	44.1%
	Republican	166,710	48.4%
	Independent	26,055	7.6%

1910	Democratic	124,615	40.2%
	Republican	165,992	53.6%
	Independent	16,519	5.3%
	Other	2,830	0.9%