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Toss-up · 2018 House
Illinois House
In the 2018 Illinois House race, Mike Bost (R) won by about 6 points.
Actual result
R+6.2
Final polls said
R+8.5
1 late poll · ✓
VotePredictor Elections predicted
—
Winner
Rep
"Final polls said" averages polls from the last ~3 weeks — the call right before the vote, and how pollsters are rated. VotePredictor Elections' prediction is walk-forward (trained only on earlier races).
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 | The New York Times/Siena College | R+8.5 | 2.3 | ✓ |
| 2 | Global Strategy Group | R+1.0 | 5.2 | ✓ |
| 3 | DCCC Targeting and Analytics Department | R+1.0 | 5.2 | ✓ |
Forecasters — pre-election win probability, scored by Brier
| # | Forecaster | Win prob | Brier | Called |
|---|---|---|---|---|
| 1 | The Economist | Rep 85% | 0.021 | ✓ |
| 2 | VotePredictor Elections | Rep 83% | 0.029 | ✓ |
| 3 | FiveThirtyEight | Rep 76% | 0.058 | ✓ |
| 4 | Cook Political | Rep 75% | 0.062 | ✓ |
| 5 | Sabato's Crystal Ball | Rep 75% | 0.062 | ✓ |
| 6 | DDHQ/Decision Desk | Rep 65% | 0.123 | ✓ |
The polls behind it
3 polls · newest firstPollsterDateSampleMiss
The New York Times/Siena College2018-10-202
Global Strategy Group2018-10-055
DCCC Targeting and Analytics Department2018-09-265
Frequently asked questions
Who won the 2018 Illinois House race?
Mike Bost (R) won, by about 6.2 points (R+6.2).
When was the 2018 Illinois House election held?
It was held in November 2018.
Which party matches you?
These candidates split on taxes, health care, guns, and abortion. See where you land — and which members of Congress actually vote like you.