← all past elections
Toss-up · 2018 Senate
Washington Senate
In the 2018 Washington Senate race, Maria Cantwell (D) won by about 17 points.
Actual result
D+16.9
Final polls said
D+14.0
1 late poll · ✓
VotePredictor Elections predicted
—
Winner
Dem
"Final polls" = the last ~3 weeks; the prediction is walk-forward. How this is scored →
Final rankings
How everyone who called this race did, ranked — VotePredictor Elections shown inline (★).
Pollsters — each pollster's final poll vs the result
| # | Pollster | Final call | Miss | Called |
|---|---|---|---|---|
| 1 | Elway Research | D+14.0 | 2.9 | ✓ |
Forecasters — pre-election win probability, scored by Brier
| # | Forecaster | Win prob | Brier | Called |
|---|---|---|---|---|
| 1 | Cook Political | Dem 99% | 0.000 | ✓ |
| 2 | DDHQ/Decision Desk | Dem 98% | 0.000 | ✓ |
| 3 | FiveThirtyEight | Dem 100% | 0.000 | ✓ |
| 4 | JHK Forecasts | Dem 100% | 0.000 | ✓ |
| 5 | Sabato's Crystal Ball | Dem 99% | 0.000 | ✓ |
| 6 | Inside Elections | Dem 99% | 0.000 | ✓ |
| 7 | VotePredictor Elections | Dem 100% | 0.000 | ✓ |
The polls behind it
1 poll · newest firstPollsterDateSampleMiss
Elway Research2018-10-063
Frequently asked questions
Who won the 2018 Washington Senate race?
Maria Cantwell (D) won, by about 16.9 points (D+16.9).
When was the 2018 Washington Senate election held?
It was held in November 2018.