| 2020 | Democratic | 3,045,307 | 46.1% | | | Republican | 3,278,272 | 49.7% | | | Independent | 200,803 | 3.0% | | | Other | 76,220 | 1.2% | |
| 2016 | Democratic | 2,958,818 | 50.0% | | | Republican | 2,667,318 | 45.1% | | | Independent | 158,942 | 2.7% | | | Other | 131,853 | 2.2% | |
| 2012 | Democratic | 2,729,565 | 49.7% | | | Republican | 2,548,767 | 46.4% | | | Independent | 210,876 | 3.8% | |
| 2008 | Democratic | 3,336,219 | 59.0% | | | Republican | 2,134,543 | 37.7% | | | Other | 184,029 | 3.3% | |
| 2004 | Democratic | 2,786,909 | 52.1% | | | Republican | 2,430,648 | 45.4% | | | Other | 135,361 | 2.5% | |
| 2000 | Democratic | 2,651,551 | 56.8% | | | Republican | 1,862,934 | 39.9% | | | Other | 150,056 | 3.2% | |
| 1980 | Democratic | 2,077,966 | 50.2% | | | Republican | 1,979,594 | 47.9% | | | Other | 78,892 | 1.9% | |
| 1976 | Democratic | 2,300,049 | 53.8% | | | Republican | 1,923,313 | 45.0% | | | Other | 54,680 | 1.3% | |
| 1972 | Democratic | 2,448,938 | 55.4% | | | Republican | 1,918,091 | 43.4% | | | Other | 54,149 | 1.2% | |
| 1968 | Democratic | 2,451,789 | 54.1% | | | Republican | 2,007,645 | 44.3% | | | Other | 73,677 | 1.6% | |
| 1960 | Democratic | 2,528,740 | 51.3% | | | Republican | 2,383,178 | 48.4% | | | Other | 16,443 | 0.3% | |
| 1956 | Democratic | 2,116,744 | 47.1% | | | Republican | 2,364,017 | 52.7% | | | Other | 8,998 | 0.2% | |
| 1952 | Democratic | 2,135,027 | 47.5% | | | Republican | 2,349,313 | 52.3% | | | Other | 5,847 | 0.1% | |
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