- Wisconsin: Ron Johnson trails his likely Democratic opponent by 8 points — the most vulnerable R incumbent in any competitive state.
- Pennsylvania (McCormick −4) and North Carolina (Tillis −6) are the next most endangered R seats; Ohio (Moreno −4) trending in that direction.
- Polling averages in competitive races show a D+3 to D+5 net Senate gain under current conditions — potentially flipping majority control.
- See individual incumbent ratings in the Senate approval tracker and the full battleground state tracker.
Competitive Senate Races — Polling Averages
All eight genuinely competitive 2026 Senate races, sorted by current polling methodology. Averages compiled from the three most recent qualifying state polls. A poll qualifies if it has a sample of 400+ registered or likely voters and a field date within 60 days.
| State | Incumbent | Party | Latest Poll | Poll Average | Trend | Rating |
|---|---|---|---|---|---|---|
| Wisconsin | Ron Johnson | R | D+9 (Marquette) | D+8 | ↓ R losing ground | Lean D |
| North Carolina | Thom Tillis | R | D+5 (Emerson) | D+6 | ↓ R losing ground | Lean D |
| Pennsylvania | Dave McCormick | R | D+3 (Quinnipiac) | D+4 | ↓ R trailing | Toss-up |
| Ohio | Bernie Moreno | R | D+3 (Emerson) | D+4 | ↓ R trailing | Toss-up |
| Maine | Susan Collins | R | D+2 (Marist) | D+3 | ↓ R slight deficit | Toss-up |
| Georgia | Jon Ossoff | D | D+4 (Fox News) | D+5 | ↑ D stable | Lean D |
| Michigan | Elissa Slotkin | D | D+3 (EPIC-MRA) | D+4 | ↑ D holds edge | Lean D |
| New Hampshire | Maggie Hassan | D | D+8 (UNH) | D+7 | ↑ D comfortable | Likely D |
Polling Margin Chart — Competitive Races
Polling averages for all 8 competitive Senate races. Blue bars indicate a Democratic lead; red bars indicate a Republican lead. All margins reflect the challenger advantage vs. incumbent performance.
Key Analysis
Four R Seats at Risk
Wisconsin (Johnson -8) and North Carolina (Tillis -6) look like genuine Democratic pickups at current polling. Ohio and Pennsylvania are true toss-ups. If Democrats hold Georgia and Michigan, a net +4 gain is plausible — enough for a 51-seat majority.
6-Month Polling Accuracy
In 2022, Senate averages 6 months out were accurate within 2-3 points in most races. In 2020, Maine and North Carolina saw 5+ point Republican overperformance vs. averages. A structural polling miss favoring Republicans would tighten all these races significantly.
Trump at 39% Hurts R Senate
Trump's sub-40% approval in Wisconsin and North Carolina directly weights on Senate incumbents. In wave elections, Senate races follow presidential drag within 2-3 points. Johnson polling at -8 is consistent with a state where Trump's net approval is approximately -15 among independents.
Historical Senate Polling Accuracy in Final 6 Months
How accurate were Senate polling averages in the final 6 months of recent competitive cycles? Error is calculated as the absolute difference between the final polling average and the actual election result.
| Cycle | Avg. Error | Direction of Miss | Notable Misses |
|---|---|---|---|
| 2022 | 2.1 pts | Slightly R-favoring | PA (Fetterman overperformed), NV (tight as polled) |
| 2020 | 4.3 pts | Significantly R-favoring | ME Collins +9 vs polls (D+1), NC Tillis +2 vs polls (D+2) |
| 2018 | 2.6 pts | Slightly D-favoring | IN, ND overperformed R vs polls |
| 2016 | 3.1 pts | Slightly R-favoring | PA, WI, MI Senate underestimated R performance |
| 2014 | 2.4 pts | R-favoring (wave year) | NC, IA, CO all more R than polled |
Frequently Asked Questions
Which Senate races are most competitive in 2026?
Wisconsin (Ron Johnson, R, D+8), North Carolina (Thom Tillis, R, D+6), and Pennsylvania (Dave McCormick, R, D+4) are the three most competitive Republican-held seats. On the Democratic side, Georgia (Ossoff, D+5) and Michigan (Slotkin, D+4) are the main defensive concerns. New Hampshire (Hassan, D+7) is rated Likely D and is not currently a Republican opportunity.
How reliable is Senate polling 6 months before Election Day?
Directionally reliable, but margins should be treated as rough guides. The average Senate polling error in competitive races over 2014-2022 was 2.1-4.3 points depending on the cycle. Structural polling misses favoring Republicans have occurred in three of the last four cycles. A 3-point systematic miss toward Republicans would make all of these races tighter — Wisconsin and North Carolina would become toss-ups rather than Lean D.
Do Democrats have a realistic path to the Senate majority?
Yes. Democrats need a net gain of 3 seats. Current polling shows them leading in Wisconsin (+8), North Carolina (+6), Pennsylvania (+4), and Ohio (+4) — all Republican-held. If these averages hold even with a 2-point Republican correction, Democrats would still flip Wisconsin and North Carolina and reach 49 seats. Flipping Pennsylvania in addition would reach 50. Holding Georgia and Michigan gets them to 51.
Senate Polling 2026 - Video
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