| 2020 | Democratic | 2,623,458 | 48.4% | | | Republican | 2,800,655 | 51.6% | |
| 2016 | Democratic | 2,093,449 | 45.3% | | | Republican | 2,393,577 | 51.8% | | | Other | 132,654 | 2.9% | |
| 2012 | Democratic | 2,181,472 | 49.9% | | | Republican | 2,187,779 | 50.1% | |
| 2008 | Democratic | 2,132,970 | 51.1% | | | Republican | 1,914,941 | 45.9% | | | Independent | 126,074 | 3.0% | |
| 2004 | Democratic | 1,888,397 | 55.6% | | | Republican | 1,453,705 | 42.8% | | | Other | 56,368 | 1.7% | |
| 2000 | Democratic | 1,500,206 | 52.3% | | | Republican | 1,315,825 | 45.9% | | | Other | 50,352 | 1.8% | |
| 1996 | Democratic | 1,339,893 | 54.5% | | | Republican | 1,094,531 | 44.5% | | | Other | 23,948 | 1.0% | |
| 1984 | Democratic | 1,149,214 | 53.7% | | | Republican | 990,728 | 46.3% | |
| 1968 | Democratic | 801,955 | 55.4% | | | Republican | 646,643 | 44.6% | |
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