2026 United States Senate election in Colorado

For related races, see 2026 United States Senate elections.

2026 United States Senate election in Colorado

←  2020 November 3, 2026 2032 →

Party Democratic Republican

Incumbent U.S. senator John Hickenlooper Democratic

The 2026 United States Senate election in Colorado will be held on November 3, 2026, to elect a member of the United States Senate to represent the state of Colorado. Primary elections will be held on June 30, 2026. Incumbent Democratic senator John Hickenlooper, who was first elected in 2020, has stated that he plans to run for re-election. He has also said that this will be his last campaign for Senate. ^[1]

Democratic primary

Candidates

Declared

• Karen Breslin, college professor, candidate for U.S. Senate in 2022, and candidate for Colorado's 4th congressional district in 2024 ^[2]
• Julie Gonzales, state senator from the 34th district (2019–present) ^[3]
• John Hickenlooper, incumbent U.S. senator ^[1]

Withdrawn

• Nichole Miner, college student ^[4]
• Brashad Hasley, software engineer ^[5]
• A.J. Zimpfer, accountant ^[6]

Endorsements

Karen Breslin

Organizations

• Our Revolution Denver ^[7]
• Track AIPAC ^[8]

John Hickenlooper

Organizations

• AIPAC ^[9]
• Brady Campaign ^[10]
• End Citizens United ^[11]
• Giffords ^[12]
• J Street PAC ^[13]
• Jewish Democratic Council of America ^[14]
• Joint Action Committee for Political Affairs ^[15]
• League of Conservation Voters Action Fund ^[16]
• Population Connection ^[17]
• 314 Action ^[18]

Fundraising

Campaign finance reports as of December 31, 2025
Candidate	Raised	Spent	Cash on hand
Karen Breslin (D)	$130,570	$123,285	$7,284
Julie Gonzales (D)	$178,844	$17,952	$160,892
Brashad Hasley (D)	$20,313	$19,429	$884
John Hickenlooper (D)	$7,607,184	$5,371,502	$3,877,765
Anthony Zimpfer (D)	$4,131	$2,227	$1,904
Source: Federal Election Commission [19]

Republican primary

Candidates

Declared

• Mark Baisley, state senator from the 4th district (2023–present) (previously ran for governor ) ^[20]
• Janak Joshi, former state representative from the 16th district (2011–2017) and candidate for Colorado's 8th congressional district in 2024 ^[21]
• George Markert, AI strategic advisor ^[22]
• Sean Pond, Montrose County commissioner ^[23]

Filed paperwork

• Amanda Calderon, business owner ^[24]
• Dathan Jones, pastor ^[25]

Declined

• Brandi Bradley, state representative from the 39th district (2023–present) ^[22]

Endorsements

George Markert

U.S. representatives

• Tom Tancredo, former CO-06 (1999–2009) ^[26]

Fundraising

Campaign finance reports as of December 31, 2025
Candidate	Raised	Spent	Cash on hand
Janak Joshi (R)	$458,096	$108,971	$349,120
George Markert (R)	$174,567	$102,024	$72,543
Source: Federal Election Commission [19]

Independent candidates

Candidates

Filed paperwork

• Clinton Roosevelt Dale ^[27]
• Joshua William Kuebler ^[28]

General election

Predictions

Source	Ranking	As of
Inside Elections [29]	Solid D	January 12, 2026
The Cook Political Report [30]	Solid D	January 12, 2026
Sabato's Crystal Ball [31]	Safe D	January 29, 2026
Race To The WH [32]	Safe D	February 2, 2026

See also

• 2026 Colorado gubernatorial election
• 2026 Colorado elections

References

1. Sarles, Jesse (August 22, 2024). "Sen. John Hickenlooper says his re-election bid in two years will be his last campaign for Senate". CBS News . Retrieved December 6, 2024.
2. Deal, Nathan (May 18, 2025). "Karen Breslin, Democrat looking to primary Hickenlooper, holds GJ town hall". The Daily Sentinel . Retrieved December 8, 2025.
3. Moore, Marilyn (December 8, 2025). "State Sen. Julie Gonzales announces run for Hickenlooper's seat". KUSA-TV .
4. "Due to some recent health issues which are affecting the campaign and my ability to focus on my child's healing, I am dropping out of the Colorado US Senate Election. I'll continue to advocate for better state and national policy, and volunteering with the CDP. I'm still in this fight with y'all!". via Facebook. July 3, 2025. Retrieved November 3, 2025.
5. "Brashad Hasley Announces New Chapter: From Government Action to Public Impact Through Technology". via Instagram . February 2, 2026. Archived from the original on February 5, 2026. Retrieved February 3, 2026.
6. "I want to thank my wife for letting me do this and for supporting me every step of the way. Thank you to everyone who donated, volunteered, or encouraged me along the way. I put my faith in Julie Gonzales and Karen Breslin to carry the progressive banner forward. Whether John Hickenlooper serves one more year or seven, I hope he can do better for our state". via Instagram . February 4, 2026. Retrieved February 5, 2026.
7. "Our Revolution Metro Denver is proud to announce its endorsement of Karen Breslin for US Senate, a US Senate candidate for 2026! She is determined to fight and defund the oligarchs and fund the people instead. She is not a status quo politician and is not a political insider. She's running against Hickenlooper". via Facebook . October 24, 2025. Retrieved November 3, 2025.
8. "Our Endorsements". Track AIPAC. Retrieved December 5, 2025.
9. "- AIPAC Political Portal". candidates.aipacpac.org. Retrieved April 28, 2025.
10. "Candidates". Brady PAC. Retrieved January 29, 2026.
11. "End Citizens United Endorses Senator John Hickenlooper for Reelection". endcitizensunited.org. November 20, 2025. Retrieved November 26, 2025.
12. "GIFFORDS PAC endorses Colorado Sen. John Hickenlooper for reelection". GIFFORDS. July 28, 2025. Retrieved July 29, 2025.
13. "John Hickenlooper". JStreetPAC. Retrieved October 16, 2025.
14. "JDCA Endorsed Candidates". Jewish Democratic Council of America. Retrieved October 16, 2025.
15. "Candidates". Joint Action Committee for Political Affairs.
16. "LCV Action Fund Announces New Slate of Endorsements for U.S. Senate". League of Conservation Voters . October 3, 2025.
17. "2026 Endorsements". Population Connection Action Fund. Retrieved November 18, 2025.
18. "US Senate, Governors & Statewides". 3.14 Action. Retrieved November 18, 2025.
19. "2026 Election United States Senate - Colorado". fec.gov. Federal Election Commission . Retrieved November 3, 2025.
20. Toomer, Lindsey (January 5, 2026). "Republican Mark Baisley now running for U.S. Senate, drops bid for Colorado governor". Colorado Newsline. Retrieved January 6, 2026.
21. Luning, Ernest (July 8, 2025). "Republican Janak Joshi files to challenge John Hickenlooper in Colorado's 2026 US Senate race". Colorado Politics . Retrieved July 9, 2025.
22. Paul, Jesse (July 1, 2025). "John Hickenlooper is up for reelection. Colorado Republicans don't really have a candidate to challenge him". The Colorado Sun . Retrieved July 1, 2025.
23. "Sean Pond seeks U.S. Senate seat". Montrose Press. January 5, 2026. Archived from the original on January 5, 2026. Retrieved January 5, 2026.
24. "FEC Form 2: Statement of Candidacy — Calderon, Amanda (FEC ID S6CO00523)" (PDF). Federal Election Commission. January 7, 2026. Retrieved January 12, 2026.
25. "FEC Form 2 for Report FEC-1919496". docquery.fec.gov. Retrieved October 15, 2025.
26. Luning, Ernest (August 26, 2025). "Tom Tancredo endorses Hickenlooper challenger George Markert in Colorado's GOP US Senate primary". Colorado Politics . Retrieved October 9, 2025.
27. "Statement of Candidacy". March 2, 2023. Retrieved April 16, 2025.
28. "Statement of Candidacy". August 1, 2024. Retrieved April 16, 2025.
29. "Senate Ratings". Inside Elections. Retrieved January 14, 2025.
30. "2026 CPR Senate Race Ratings". Cook Political Report. Retrieved February 11, 2025.
31. "2026 Senate ratings". Sabato's Crystal Ball. Retrieved February 13, 2025.
32. "2026 Senate Forecast". Race to the WH. Retrieved March 19, 2025.

External links

Official campaign websites

• Mark Baisley (R)
• Amanda Calderon (R)
• Karen Breslin (D)
• Julie Gonzales (D)
• Brashad Hasley (D)
• John Hickenlooper (D)
• Dathan Jones (R)
• Janak Joshi (R)
• George Markert (R)
• A.J. Zimpfer (D)