A 29-year-old Democratic Socialists of America-backed candidate ended Rep. Diana DeGette's three-decade hold on Colorado's 1st Congressional District on Tuesday evening, the latest sign that the progressive left is systematically replacing establishment Democrats in safe blue seats across the country.
Melat Kiros, a PhD student and former attorney who has never held elected office, defeated DeGette in the Democratic primary for the Denver-anchored district, a seat so deep blue that Kamala Harris carried it by 56 points in 2024. The Associated Press called the race Tuesday night. National Review reported that Kiros secured just over 50 percent of the vote, overcoming a significant fundraising disadvantage.
The result means Kiros is virtually certain to enter Congress in January. And it means the Democratic Party's internal reckoning, already visible in New York City primaries the week before, has now spread west.
DSA telegraphed the move. The organization posted on social media last week, after its candidates won Democratic primaries in New York City: "Today, the East Coast, next week the Mountain West." That boast turned out to be operational planning.
Kiros ran with endorsements from Sen. Bernie Sanders (I-Vt.) and Rep. Alexandria Ocasio-Cortez (D-N.Y.), along with backing from Justice Democrats. DeGette, a member of the Congressional Progressive Caucus who served as an impeachment manager during Trump's second impeachment trial in 2021, countered with the endorsement of former CPC Chairwoman Pramila Jayapal and the support of Colorado's established Democratic House delegation.
It wasn't enough. AP News reported that DeGette did not speak or release a statement after the race was called Tuesday night.
The warning signs had been visible for months. Newsmax reported that at a March Democratic assembly, first-time candidate Kiros outperformed DeGette, a foreshadowing the incumbent apparently failed to heed. National Review noted that DeGette barely made it onto the primary ballot, receiving only 33 percent of delegate votes at the convention, just above the 30 percent threshold required.
A third candidate, University of Colorado Regent Wanda James, also ran and may have split votes in a way that shaped the outcome.
Kiros, born in Ethiopia, brings a record that would have disqualified most candidates in a prior era of Democratic politics. In 2023, she was fired from a New York law firm after publishing an open letter arguing that pro-Palestinian student protesters calling for the elimination of Israel were not antisemitic, and appearing to defend Hamas.
She described the October 7, 2023, Hamas attacks against Israel as the "inevitable consequence of apartheid." She declined to characterize the deadly firebombing of protesters in Boulder, people urging the release of hostages held by Hamas in Gaza, as antisemitic. Congress passed a bipartisan resolution in June 2025 condemning that attack as part of a "rise in ideologically motivated attacks on Jewish individuals." Every present lawmaker voted in favor. Only Reps. Rashida Tlaib (D-Mich.) and Thomas Massie (R-Ky.) voted present.
In a television interview with Colorado's 9News, Kiros addressed the Boulder firebombing this way:
"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."
That same interview produced her remarks on September 11. Asked whether the attacks were the inevitable consequence of American foreign policy, Fox News reported Kiros responded:
"Inevitable in the sense that we destabilized a lot of the Middle East that forced people to believe that another act of violence was the only response. And again, just like I said before, our responsibility is to get rid of those conditions that lead to violence in the first place."
DeGette, hardly a moderate herself, posted on Facebook earlier this month in response:
"I'm shocked and disgusted that Kiros is doubling down on excusing terrorism and the murder of innocent people."
That a 30-year incumbent who supports abolishing ICE and pushed for Medicare-for-All found herself outflanked on the left tells you something about where the energy in the Democratic Party lives right now.
Kiros' victory did not happen in isolation. DSA and Justice Democrats have built a pipeline designed to identify safe blue districts, recruit ideologically aligned challengers, and overwhelm incumbents who lack grassroots energy. The model worked for Ocasio-Cortez in 2018. It is working again now, on a larger scale and in more places.
Controversial socialist streamer Hasan Piker, who has said Hamas is "a thousand times better" than Israel and praised the Chinese Communist Party, backed Kiros' insurgent run. That an online personality with those views can serve as a credible kingmaker in a major-party primary tells you how far the Overton window has shifted inside the Democratic coalition.
Just the News described Kiros as a progressive critic of "establishment Democrats." That framing undersells what happened. Kiros did not merely criticize the establishment. She replaced it, in a district where the establishment had governed unchallenged for three decades.
After the race was called, Kiros posted: "We are winning from coast to coast. We are taking back our party and our country!" She added: "This is a movement. We are just getting started."
The broader pattern is hard to miss. DSA-backed candidates swept New York primaries the previous week. That wave drew sharp political responses and raised immediate questions about whether the Democratic Party's leadership could hold its center.
DeGette's loss in Denver answers that question, at least in deep-blue districts. The incumbents being toppled are not Blue Dog moderates. They are members of the Progressive Caucus, endorsed by progressive leaders, running on progressive platforms. And they are still losing to candidates who stand further left.
DeGette argued during the campaign that her seniority on an influential House committee would allow her to push for Medicare-for-All legislation. Kiros accused her of ineffectiveness. The voters sided with the challenger who promised more, faster, and harder to the left.
Veteran Democratic strategists have warned that this trend threatens the party's ability to compete in swing districts and hold a national coalition together. But the math in safe seats works against them. In a district that votes Democratic by 56 points, the general election is an afterthought. The primary is the only election that matters. And in low-turnout primaries, organized ideological factions punch well above their weight.
That structural advantage is exactly what DSA has exploited, first in New York, now in Colorado, and almost certainly in more districts before 2026 is over.
Kiros will face a Republican opponent in November in a district where that opponent has essentially no path to victory. Barring something extraordinary, she will be seated in Congress next year, a 29-year-old who was fired from her law firm for defending Hamas, who called the 9/11 attacks "inevitable," and who refused to call a deadly firebombing of Jewish-cause protesters antisemitic.
She will join a growing DSA-aligned caucus inside the House Democratic conference. The same dynamic is playing out in local races, where democratic socialists are displacing establishment Democrats in city halls and statehouses.
The Democratic Party's leadership has so far treated these losses as isolated upsets. They are not isolated. They are coordinated, well-funded relative to the races, ideologically coherent, and accelerating.
When a 30-year incumbent who already supports abolishing ICE and government-run health care loses her own primary because she isn't left enough, the party doesn't have a messaging problem. It has a direction problem. And the direction is exactly what the DSA promised it would be.
