Nonpartisan Analysis Since 1980

Colorado
Senate

State Map

State map

Current Rating

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Solid D

2025 Baseline

What's This?
D +10.6
D: 53.8%, R: 43.2%

2026 Election

Class II

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Class III

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Past Elections

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Calendar

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MAR
17
2026
Candidate Filing Deadline
JUN
30
2026
Primary Election Day
NOV
3
2026
Election Day

Analysis

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Colorado Primary Results: Rough Night for Washington

June 30, 2026
by Nicholas Demba

2026 Senate Overview

January 22, 2026
by Nathan Gonzales & Jacob Rubashkin

2026 Senate Overview (Oct. 23, 2025): Alabama – Kansas

October 23, 2025
by Jacob Rubashkin

Senate & Governor Report Shorts (Sept. 11, 2025)

September 11, 2025
by Jacob Rubashkin

2026 Senate Overview (July 24, 2025): Alabama – Kansas

July 24, 2025
by Jacob Rubashkin

2026 Senate Overview (April 17, 2025): Alabama – Kansas

April 17, 2025
by Jacob Rubashkin

Report Shorts (March 7, 2025)

March 7, 2025
by Jacob Rubashkin

2026 Senate Overview (Jan. 9, 2025): Alabama – Kansas

January 9, 2025
by Jacob Rubashkin

Ratings

2026
January 9, 2025
Solid Democrat
January 6, 2023
Not Up This Cycle
2024
January 6, 2023
Not Up This Cycle
2022
June 29, 2022
Likely Democrat
January 8, 2021
Not Up This Cycle
January 8, 2021
Solid Democrat
2020
December 15, 2020
Lean Democrat
October 16, 2020
Lean Democrat
April 3, 2020
Tilt Democrat
January 4, 2019
Toss-up
2018
January 13, 2017
Not Up This Cycle
2016
August 19, 2016
Solid Democrat
May 5, 2016
Likely Democrat
January 9, 2015
Not Up This Cycle
January 9, 2015
Lean Democrat
2014
October 29, 2014
Tilt Republican
October 3, 2014
Toss-up
July 15, 2014
Tilt Democrat
March 14, 2014
Lean Democrat
February 26, 2014
Likely Democrat
January 25, 2013
Solid Democrat
2012
January 1, 2011
Not Up This Cycle
2010
June 24, 2010
Not Up This Cycle
June 24, 2010
Toss-up

Baselines

About
2025+10.6D 53.8, R 43.2
2024
+10.6
2022
+9.3
2020
+4.1
2018
+3.0
2016
+1.1
2014
+0.1