Colorado Election Results: Who Won & What Changed Overnight

The Colorado election results from Tuesday’s Democratic primary made it clear that voters are done waiting.

A 29-year-old democratic socialist beat a nearly 30-year incumbent, a sitting U.S. Senator lost his bid for governor, and progressives scored wins across the ballot.

Key Points

• Melat Kiros defeated Diana DeGette in Colorado’s 1st Congressional District.
• Phil Weiser beat U.S. Sen. Michael Bennet for the Democratic gubernatorial nomination.
• Manny Rutinel won the Democratic primary in the competitive 8th Congressional District.
• John Hickenlooper survived his Senate primary challenge but lost Denver to his opponent.
• Young voter turnout played a major role in shaping results.

Melat Kiros Defeats Diana DeGette in a Historic Upset

The biggest shock of the night came from Denver. As per Al Jazeera, Melat Kiros, a 29-year-old democratic socialist and first-time candidate, defeated Diana DeGette, a 29-year incumbent who has served in Congress since 1997. The Associated Press called the race just after 10 p.m., and Kiros emerged to raucous applause.

She led by nearly 5,000 votes, holding 48.6% to DeGette’s 44.2%, with CU Regent Wanda James pulling 7.3%. Over 109,900 votes had been counted. A significant jump from the roughly 79,000 cast in 2024, when DeGette ran unopposed.

Kiros was outspent more than 2-to-1 but still won by a wide margin. Her campaign knocked on 100,000 doors and built a massive volunteer army driven largely by Gen Z energy.

“Denver voters of all ages, of all races, of all religions sent a clear message: We will not wait!” Kiros told the crowd.

She ran on a platform of universal healthcare, abolishing ICE, rejecting corporate PAC money, and ending what she calls the genocide in Gaza. She also promised to take the fight to “Donald Trump and the oligarchy.”

The Republican candidate in the heavily Democratic district is Christy Peterson, who ran unopposed. Kiros is widely expected to win in November. This win is considered a major victory for the Democratic Socialists of America, following DSA-backed wins in New York the week prior.

What Made This Race So Charged

The race had layers beyond just policy. Kiros was fired from her job after refusing to delete a social media post critical of law firms over their Israel-Palestine stance.

She declined to call a deadly firebombing attack on Boulder’s Pearl Street Mall, which killed 82-year-old Karen Diamond, antisemitic, saying, “I don’t know what was in the heart of the perpetrator. All I know is that he went and attacked innocent people because of what they might have believed.”

DeGette, on the other hand, argued that experience matters most right now. “Now is not the time to gamble and send somebody with no experience,” she said during a debate at the Denver Press Club.

But voters weren’t buying it. Al Jazeera reported that Kiros’ win is being seen as a stunning victory for a first-time candidate against a nearly 30-year incumbent and a major win for the Democratic Socialists of America.

Bennet’s Governor Bid Ends, Weiser Wins Nomination

In another major upset, U.S. Senator Michael Bennet lost the Democratic gubernatorial primary to Colorado Attorney General Phil Weiser, 55% to 45%. Bennet has held his Senate seat for more than 17 years. He had also run in the 2020 presidential primaries.

Weiser, who previously served in the Obama and Clinton administrations, positioned himself as a fighter and rode the progressive wave. “We the people, not establishment politics, choose our leaders,” he said in his victory speech.

As NPR noted, Bennet joins at least two incumbent U.S. senators who have lost statewide primaries this election cycle. Weiser is now the Democratic frontrunner for governor, with Governor Jared Polis term-limited out.

On the Republican side, the race was too close to call between state Sen. Barbara Kirkmeyer, Marine Corps veteran Victor Marx, and state Sen. Scott Bottoms.

8th District: A Key Race for House Control

Colorado’s 8th Congressional District could help determine which party controls the House in November. State Rep. Manny Rutinel won the Democratic primary over state Rep. Shannon Bird, according to an AP race call. He will now face incumbent Republican Rep. Gabe Evans in what promises to be a competitive general election.

The district is about 40% Latino. Rutinel touted his Dominican background and drew a contrast with Evans on immigration. Party leaders had favored Bird as the more moderate choice, but Rutinel’s progressive record connected with voters.

CPR News noted that the Cook Political Report rates the district a “toss-up” and that it is one of only 18 such districts in the country. The House currently stands at 218 Republicans, 212 Democrats, one independent, and four vacancies.

Hickenlooper Holds On, But Barely in Denver

Senator John Hickenlooper won his Democratic Senate primary by a double-digit margin overall. But state Sen. Julie Gonzales beat him in Denver while taking at least 44% of the vote statewide.

After his win, Hickenlooper quickly turned his focus to Trump, saying Coloradans “are not going to accept Trump’s broken promises and cost of living emergency or his constant corruption.”

Young Voters Changed Everything

Axios reported that voters aged 18–34 matched or surpassed older age groups in early turnout. The enthusiasm was visible. At Kiros’s watch party, hundreds gathered, while DeGette’s drew a handful.

“You have a bunch of 20-something leftists absolutely clobbering well-funded moderates,” said Democratic strategist Chris Nicholson.

Colorado House Speaker Julie McCluskie put it plainly: “There is an undercurrent that we don’t recognize, the pain and the anger that people are feeling, and they’ve taken it out on the establishment.”

The Colorado election results make one thing clear — the political ground is shifting fast.

Sources & References:

• Al Jazeera – Melat Kiros, a democratic socialist and first-time candidate, defeated Diana DeGette.
• NPR – Bennet joins at least two incumbent U.S. senators who have lost statewide primaries this election cycle.
• CPR – The Cook Political Report rates the district a “toss-up” and says that it is one of only 18 such districts in the country.
• Axios – Voters aged 18–34 matched or surpassed older age groups in early turnout.