Melat Kiros, a 29-year-old Ethiopian immigrant, lawyer and PhD student, defeated Diana DeGette in the Democratic primary for Colorado’s 1st congressional district on Tuesday, June 30, in one of the most dramatic upset victories of the 2026 election cycle. The Associated Press declared Kiros the projected winner at midnight, with just over 81% of votes counted by Wednesday morning. DeGette had held the seat, which covers the state capital Denver, since 1997 — longer than Kiros has been alive.
DeGette had not acknowledged the result on either of her two social media accounts by Wednesday morning, despite having received the backing of Colorado’s elected Democratic Party leaders ahead of the vote. The outcome delivered another blow to the Democratic establishment following a string of progressive primary victories across New York, New Jersey, Maine and Pennsylvania in recent weeks, many of them tied to the same coalition energised by New York City Mayor Zohran Mamdani’s primary win earlier this month.
Kiros ran as an outspoken critic of Israel’s war in Gaza and campaigned without taking funding from pro-Israel lobbying groups. DeGette, according to the watchdog AIPAC Tracker, received more than $1.6 million from the American Israel Public Affairs Committee over her three decades in Congress. At a campaign event in March, DeGette told a voter who challenged her over her failure to support the Block the Bombs Act — legislation aimed at limiting weapons transfers to Israel — that anyone for whom that was their sole issue should not vote for her.
In her victory speech, Kiros drew directly on her personal history with the issue. She recounted being fired from the multinational law firm Sidley Austin in 2023 after she wrote a letter defending students’ right to protest what she described as the genocide in Gaza. “My law firm told me, take it down or you’re fired,” Kiros said. “I didn’t flinch. I didn’t flinch because I stood by every word, and I always will.”
She said she expected similar pressure once in office. “I know that will not be the only moment where those in power will tell me to change my tune, to not rock the boat. That seems to happen a lot in Congress.”
Jewish Voice for Peace, which endorsed Kiros, said corporate money had flooded the race in its final weeks in an attempt to stop her. “In the final weeks, corporate dark money flooded the race to stop Melat — much of it from AIPAC, Amazon, and Lockheed Martin… and they smeared Melat as antisemitic for refusing to stay silent about Israel’s genocide,” the organisation said in a statement on Wednesday.
Senator Bernie Sanders, who endorsed Kiros ahead of the vote, congratulated her on social media. “The tide is turning,” Sanders wrote. “Americans are tired of status quo politics.”
The Democratic National Committee did not acknowledge Kiros’ victory until nearly 10 hours after the AP called the race. When it did, DNC chair Ken Martin made no reference to Gaza or foreign policy. “Melat Kiros is fighting to make the American dream a reality for the hardworking people of Colorado,” Martin said, listing healthcare, childcare, housing and workers’ rights as her priorities. The DNC has faced sustained criticism for not acknowledging that its 2024 presidential candidate, Kamala Harris, lost the election in part due to her refusal to condemn Israel’s conduct in Gaza.
National impact
Colorado’s 1st congressional district is one of the safest Democratic seats in the country. Kiros is all but guaranteed to win the general election in November, making her entry into the House of Representatives a near certainty. Her victory adds to a growing roster of pro-Palestine progressives set to arrive in Washington after November, drawn from a wave of primary upsets across blue states.
The result reflects a widening generational and ideological gap inside the Democratic Party. Polling published by Issues Insights in June 2026 found nearly half of Democrats said they hold a favourable view of socialism, while a Politico poll from September 2025 found similar trends taking hold among younger Democratic voters. Mamdani’s success in New York City, which he won as a Democratic Socialist with strong support from younger and Muslim voters, has served as a template for a new generation of candidates running explicitly against the party establishment’s foreign policy positions.
Background
Diana DeGette first won Colorado’s 1st district in the 1996 elections and has been returned every two years since. She served as a senior Democratic whip and sat on the House Energy and Commerce Committee. The Block the Bombs Act, which DeGette declined to co-sponsor, was introduced in Congress to restrict the transfer of US-made offensive weapons to Israel during its military campaign in Gaza. At least 73,066 Palestinians have been killed as of June 30, according to Gaza’s Health Ministry. Kiros’s campaign was endorsed by Bernie Sanders and supported by Jewish Voice for Peace, the Democratic Socialists of America and organisations tied to the Mamdani political network that helped reshape New York’s Democratic primaries earlier in June.
What happens next
Kiros will face the Republican candidate in Colorado’s 1st congressional district in November’s general election. Given the district’s deep-blue composition, she is widely expected to win and take her seat in the House of Representatives when the new Congress is sworn in. The DNC has not outlined any change in approach to primary candidates running against establishment incumbents on pro-Palestine platforms, and the party has not indicated whether it plans to re-examine its posture on Gaza in light of Tuesday’s result.
