Dave Leip's Atlas of U.S. Presidential Elections

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2018	Democratic	421,699	36.0%
	Republican	750,769	64.0%

2010	Democratic	357,162	34.9%
	Republican	666,407	65.1%

2006	Democratic	563,364	61.2%
	Republican	357,267	38.8%

2002	Democratic	615,932	60.1%
	Republican	408,833	39.9%

1994	Democratic	507,039	52.2%
	Republican	465,031	47.8%

1986	Democratic	480,177	54.6%
	Republican	399,644	45.4%

1982	Democratic	586,748	72.0%
	Republican	228,609	28.0%

1978	Democratic	457,554	66.2%
	Republican	233,678	33.8%