| Election For | Date | Votes | Registered Voters | Turn Out |
|---|---|---|---|---|
| US House of Representatives | 1998-11-03 | 66,604,802 | 146,211,960 | 45.55% |
| US Senate | 1998-11-03 | 54,115,051 | 146,211,960 | 37.01% |
| US House of Representatives | 2000-11-07 | 98,799,963 | 141,850,558 | 69.65% |
| US Senate | 2000-11-07 | 78,191,797 | 141,850,558 | 55.12% |
| Presidency of United States of America | 2000-11-07 | 105,405,100 | 141,850,558 | 74.31% |
| US Senate | 2002-11-05 | 41,689,666 | 205,800,000 | 20.26% |
| US House of Representatives | 2002-11-05 | 74,706,555 | 205,800,000 | 36.3% |
| US Senate | 2004-11-02 | - | 210,421,000 | - |
| US House of Representatives | 2004-11-02 | - | 210,421,000 | - |
| US House of Representatives | 2006-11-07 | - | 174,849,216 | - |
| US Senate | 2006-11-07 | - | 174,849,216 | - |
| US House of Representatives | 2008-11-04 | 122,586,293 | 186,983,927 | 65.56% |
| US Senate | 2008-11-04 | 64,862,287 | 186,983,927 | 34.69% |
| Presidency of United States of America | 2008-11-04 | 131,257,328 | 186,983,927 | 70.2% |
| US Senate | 2010-11-02 | 90,706,582 | 186,983,927 | 48.51% |
| US House of Representatives | 2010-11-02 | 90,706,582 | 186,983,927 | 48.51% |
| Presidency of United States of America | 2012-11-06 | 129,085,403 | 213,803,482 | 60.38% |
| US House of Representatives | 2012-11-06 | 124,793,121 | 213,803,482 | 58.37% |
| US Senate | 2012-11-06 | 93,561,320 | 213,803,482 | 43.76% |
| US Senate | 2014-11-04 | 81,687,059 | 153,157,000 | 53.34% |
| US House of Representatives | 2014-11-04 | 81,687,059 | 153,157,000 | 53.34% |
| US Senate | 2016-11-08 | 89,124,546 | 142,166,000 | 62.69% |
| Presidency of United States of America | 2016-11-08 | 137,098,601 | - | - |
| US House of Representatives | 2016-11-08 | 128,560,821 | 142,166,000 | - |
| US House of Representatives | 2018-11-06 | 118,531,932 | 235,714,420 | - |
| US Senate | 2018-11-06 | 115,897,500 | 235,714,420 | - |
| Presidency of United States of America | 2020-11-03 | 159,633,396 | 239,247,182 | - |
| US House of Representatives | 2020-11-03 | 159,633,396 | 239,247,182 | - |
| US Senate | 2020-11-03 | 86,077,286 | 129,638,315 | - |
| US Senate | 2021-01-05 | 4,444,832 | 7,738,584 | - |
| US House of Representatives | 2022-11-08 | 107,577,138 | 214,286,227 | - |
| US Senate | 2022-11-08 | 81,276,287 | 214,286,227 | - |
| US Senate | 2022-12-06 | - | 7,007,211 | - |