Katherine Clark*
DEMOCRATIC
US House of Representatives (D-MA)
2013 – Present
Massachusetts 52026 HOUSE FORECAST
Republicans
REPUBLICAN
2026 Massachusetts 5th District House Forecast:
Proprietary forecast for Massachusetts's 5th congressional district House election between Democrat Katherine Clark and Republican TBD. This page will update with a daily set of 100,000 new simulations as race fundamentals change in order to produce race odds, projected margin, and forecasted vote share. This page also includes polling averages when available.
The 2026 Massachusetts 5th District House election features Democrat Katherine Clark and Republican TBD. Incumbent Representative Katherine Clark is seeking reelection to a eighth term. In 2024, Kamala Harris won Massachusetts' 5th congressional district by 16.5%, and the election for the district's House seat is rated as solid Democratic in 2026.
- Year
- 2026
- Race
- House
- District
- MA-5
- Democratic candidate
- Katherine Clark
- Republican candidate
- TBD
- Incumbent / open seat
- Katherine Clark
- Forecast rating
- Solid D
- Projected vote
- 70.0% D / 30.0% R
- Projected margin
- D +40.0
- Forecast odds
- 99.9% D / 0.1% R
- Forecast last updated
- 12:00 AM on July 2, 2026
- Polling average
- —
- Polling average margin
- —
- Polling last updated
- —
- Polls included
- 0
- Latest poll
- —