Current Senate: 53* Democrats | 47 Republicans









|
|
|
| 37 Safe or Not Up | 5 | 4 | 8 | 3 | 1 | 42 Safe or Not Up |
| Toss Up |
|---|
| FL: Nelson (D) |
| MA: Brown (R) |
| MO: McCaskill (D) |
| MT: Tester (D) |
| NV: Heller (R) |
| OH: Brown (D) |
| VA: Open (D) |
| WI: Open (D) |
| Leans GOP |
|---|
| AZ: Open (R) |
| IN: Open (R) |
| ND: Open (D) |
| Likely GOP |
|---|
| NE: Open (D) |
| Safe GOP Seats |
* Sen. Joseph Lieberman (I-CT) & Sen. Bernard Sanders (I-VT) currently caucus with the Democrats and former Gov. Angus King is likely to caucus with the Democrats if he wins the open Maine seat in November.
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