House / CO-4Colorado's 4th district 2026 · held by Republicans
Lauren Boebert is heavily favored in CO-4
Eileen Laubacher4%Democrat
Lauren Boebert96%Republican · incumbent
Median marginR+11.080%: R+19.0 to R+3.0
Cook PVIR+92026 lines
Tipping point0.1%decides the majority
District pollsR+8.01 polls, adjusted
Range of outcomes
How the forecast is built
Lean: twice the PVI plus the generic ballot (D+8.7). Incumbency adds 3.0 points.
Chance of winning over time
Daily reruns of the modelEach day is a fresh run of today's model using only the polls that had finished by the day before. Daily runs since Jul 1.
What the forecasters say
Ten published ratings; Cook updated through Oct 27What this seat means for control
District polls
| Pollster | Field end | Sample | Result |
|---|---|---|---|
| Impact Research (D) | Sep 24 | 403 LV | 40–45 R+5.0 |