| Year,Republican,Democratic,Third parties | |
| 2016,"84.6% 48,824","12.0% 6,950","3.4% 1,956" | |
| 2012,"84.2% 45,513","13.8% 7,451","2.0% 1,098" | |
| 2008,"85.0% 43,269","13.1% 6,681",1.9% 942 | |
| 2004,"76.8% 33,976","22.4% 9,895",0.9% 382 | |
| 2000,"67.5% 24,889","29.9% 11,008",2.6% 968 | |
| 1996,"47.4% 16,159","38.9% 13,276","13.7% 4,660" | |
| 1992,"47.1% 14,808","36.6% 11,499","16.3% 5,114" | |
| 1988,"61.3% 15,779","37.5% 9,659",1.2% 305 | |
| 1984,"65.7% 17,465","33.5% 8,913",0.8% 198 | |
| 1980,"47.2% 10,666","50.1% 11,319",2.8% 624 | |
| 1976,"35.0% 5,555","62.1% 9,875",2.9% 465 | |
| 1972,"73.0% 7,481","18.5% 1,898",8.5% 874 | |
| 1968,7.7% 947,"11.4% 1,400","80.9% 9,907" | |
| 1964,"61.1% 5,508","38.9% 3,509",- | |
| 1960,14.4% 954,"43.5% 2,881","42.1% 2,793" | |
| 1956,"37.2% 1,628","58.8% 2,571",4.0% 173 | |
| 1952,"28.6% 1,436","71.4% 3,578",- | |
| 1948,7.6% 264,"53.0% 1,841","39.4% 1,366" | |
| 1944,12.2% 343,"87.8% 2,460",- | |
| 1940,7.8% 252,"92.2% 2,971",- | |
| 1936,17.0% 496,"83.0% 2,414",- | |
| 1932,4.4% 89,"95.6% 1,953",- | |
| 1928,48.2% 975,"51.8% 1,047",- | |
| 1924,14.3% 110,85.7% 657,- | |
| 1920,24.4% 218,75.5% 674,0.1% 1 | |
| 1916,6.3% 35,90.5% 503,3.2% 18 | |
| 1912,0.6% 3,80.1% 379,19.2% 91 | |