| Year, State | Senator | Winner |
| 2012 MA | |
| 2010 AR | |
| 2010 WI | |
| 2008 MN | |
| 2008 AK | |
| 2008 OR | |
| 2008 NC | |
| 2008 NH | |
| 2006 VA | |
| 2006 MO | |
| 2006 MT | |
| 2006 RI | |
| 2006 PA | |
| 2006 OH | |
| 2004 SD | |
| 2002 MO | |
| 2002 GA | |
| 2002 AR | |
| 2000 WA | |
| 2000 MO | |
| 2000 MI | |
| | Year, State | Senator | Winner |
| 2000 MN | |
| 2000 DE | |
| 2000 VA | |
| 1998 IL | |
| 1998 NY | |
| 1998 NC | |
| 1996 SD | |
| 1994 PA | |
| 1994 TN | |
| 1993 TX | |
| 1992 WI | |
| 1992 CA | |
| 1992 GA | |
| 1992 NC | |
| 1990 MN | |
| 1988 CT | |
| 1988 NE | |
| 1988 NV | |
| 1988 MT | |
| 1986 NC | |
| 1986 ND | |
| | Year, State | Senator | Winner |
| 1986 SD | |
| 1986 GA | |
| 1986 AL | |
| 1986 FL | |
| 1986 WA | |
| 1984 IL | |
| 1984 IA | |
| 1984 KY | |
| 1982 NV | |
| 1982 NM | |
| 1980 NY | |
| 1980 WA | |
| 1980 NC | |
| 1980 WI | |
| 1980 GA | |
| 1980 ID | |
| 1980 IN | |
| 1980 NH | |
| 1980 IA | |
| 1980 SD | |
|