Why It Matters

Sen. John Hickenlooper (D-CO) won reelection to Colorado's U.S. Senate seat on Nov. 3, retaining the seat for Democrats, according to Colorado Public Radio. Hickenlooper defeated Republican state Sen. Mark Baisley (R-CO), securing a second six-year term after a general election in which he benefited from a substantial fundraising advantage and favorable polling. ​

The victory preserved Democratic control of both Colorado Senate seats. Hickenlooper, a former Denver mayor and two-term governor, has said this will be his final Senate term.

Vote Count

The Colorado secretary of state's election night reporting page showed Hickenlooper with 1,302,590 votes, or approximately 60.4%, and Baisley with 764,192 votes, or 35.4%, as of 3:47 a.m. Nov. 4. Hickenlooper led by 538,398 votes, approximately 25 percentage points. Those figures were unofficial election-night results, not a certified canvass.

The New York Times results page, citing the Associated Press, showed a different reporting snapshot, with Hickenlooper receiving 1,310,885 votes to Baisley's 773,924, with 88% reporting. The differing totals reflect separate reporting snapshots rather than conflicting certified results. A final certified margin has not been established.

The Incumbent

Hickenlooper took office Jan. 3, 2021, and has served nearly six years in the Senate. During the 119th Congress, he serves on four full committees: Commerce, Science and Transportation; Energy and Natural Resources; Health, Education, Labor and Pensions; and Small Business and Entrepreneurship.

He also serves as ranking member of the Commerce Subcommittee on Consumer Protection, Technology and Data Privacy and the HELP Subcommittee on Employment and Workplace Safety.

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In the 119th Congress, Hickenlooper sponsored S. 5587, the National Critical Minerals Council Act, which would establish a council within the Executive Office of the President to coordinate a national strategy for critical minerals and materials. Hickenlooper introduced the legislation Sept. 29 with four original cosponsors. The Senate Energy and Natural Resources Committee referred it the same day.

Money

The fundraising gap was substantial. Hickenlooper raised approximately 85 times more than Baisley, reporting $11,695,273.06 in total receipts compared with Baisley's $138,210.47, according to the campaign finance figures compiled in the race record.

Hickenlooper also outspent Baisley by more than 100-to-1 in total disbursements, $11,778,528 to $110,837. Hickenlooper reported $1,558,827.90 in cash on hand, while Baisley reported $27,709.93.

The race record identified $855,193 in outside spending supporting Democratic candidates, with no recorded expenditures opposing any candidate as of Nov. 4. The reported spending included:

  • Hickenlooper: $549,203 in support.
  • Julie Gonzales: $305,990 in support during the Democratic primary.

The largest reported outside spender was Common Sense Action Fund, with $300,000, followed by Working Families Party PAC, with $224,859.52, and Our Future Colorado, with $195,250.Campaign Context

Baisley criticized Hickenlooper for concentrating too much on President Trump and not enough on Colorado, according to The Denver Post on Oct. 23, 2026 (Denver Post). In his campaign's first general-election ad, Hickenlooper said Baisley considered the Iran war "worth all this pain" and argued Baisley would be "another senator for Donald Trump," according to Colorado Politics on Oct. 6, 2026 (Colorado Politics); the race record does not independently substantiate either claim.

Campaign Context

Baisley criticized Hickenlooper for focusing too heavily on President Donald Trump and not enough on Colorado, according to The Denver Post on Oct. 23.

In his campaign's first general-election advertisement, Hickenlooper criticized Baisley's support for the Iran war, saying Baisley considered the conflict "worth all this pain." Hickenlooper also argued Baisley would be "another senator for Donald Trump," according to Colorado Politics on Oct. 6.

Pre-Election Indicators

The Cook Political Report, Sabato's Crystal Ball and Inside Elections all rated the Colorado Senate race Solid Democratic as of Nov. 3, according to the race record. The Cook Political Report last updated its Solid Democratic rating Feb. 11, 2025.

On Kalshi, Hickenlooper's implied probability of winning stood at 99%, compared with Baisley's 1%, as of Nov. 2. The Coloradoan also reported those probabilities on Nov. 2.

The Legis1 polling average as of Nov. 2 showed Hickenlooper leading Baisley 58.0% to 37.8%, a reported margin of 20.3 percentage points, based on six polls. The displayed percentages produce a 20.2-point difference before accounting for rounding.

Hickenlooper's approximately 25-point lead in the Nov. 4 unofficial election-night snapshot exceeded the polling average by roughly 4.7 percentage points. A separately verified final polling average from another aggregator was not available.

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