| State / Party | Senator | Replacing (Incumbent / Party) |
| Arkansas / Republican | |
| Connecticut / Democratic | |
| Delaware / Democratic | |
| Florida / Republican | |
| Illinois / Republican | |
| Indiana / Republican | |
| Kansas / Republican | |
| Kentucky / Republican | |
| | State / Party | Senator | Replacing (Incumbent / Party) |
| Missouri / Republican | |
| New Hampshire / Republican | |
| North Dakota / Republican | |
| Ohio / Republican | |
| Pennsylvania / Republican | |
| Utah / Republican | |
| Wisconsin / Republican | |
| West Virginia / Democratic | |
|