Nonpartisan Analysis Since 1980

Massachusetts
Senate I

State Map

State map

Current Rating

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Not Up This Cycle

2025 Baseline

What's This?
D +29.6
D: 63.5%, R: 33.9%

Incumbent

Warren

Past Elections

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Calendar

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SEP
1
2026
Primary Election Day
NOV
3
2026
Election Day

Analysis

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Gubernatorial Overview (June 25, 2026)

June 25, 2026
by Jacob Rubashkin, Nathan Gonzales & Inshara Ali

2026 Senate Overview

January 22, 2026
by Nathan Gonzales

2026 Senate Overview (Oct. 23, 2025): Kentucky – New Mexico

October 23, 2025
by Jacob Rubashkin

Report Shorts (Oct. 23, 2025)

October 23, 2025
by Jacob Rubashkin

2025-2026 Gubernatorial Overview (Aug. 28, 2025): Iowa – New Mexico

August 28, 2025
by Jacob Rubashkin

Ratings

2026
January 9, 2025
Not Up This Cycle
2024
January 6, 2023
Solid Democrat
2020
January 4, 2019
Not Up This Cycle
2018
January 13, 2017
Solid Democrat
2014
January 25, 2013
Not Up This Cycle
2012
October 26, 2012
Tilt Democrat
November 18, 2011
Toss-up
January 28, 2011
Tilt Republican
2010
June 24, 2010
Not Up This Cycle

Baselines

About
2025+29.6D 63.5, R 33.9
2024
+29.6
2022
+30.7
2020
+26.6
2018
+22.9
2016
+17.8
2014
+18.9