Democratic Socialist Kiros Defeats 15-Term Incumbent DeGette in Colorado Primary Upset

Generational Shift Rocks Denver’s Congressional Race

Democratic socialist Melat Kiros unseated long-serving US representative Diana DeGette in Colorado’s primary elections held on Tuesday, the latest in a string of high-profile victories for the party’s insurgent left. The Associated Press reported that Kiros defeated DeGette for the Democratic nomination in the deep-blue first congressional district centered on Denver. Kiros’s triumph came a week after New York voters unseated two Democratic congressional incumbents and replaced a third who was retiring with candidates who had campaigned on standing up to Israel amid accusations that it was carrying out a genocide in Gaza.

Her success in the solidly Democratic 1st District all but ensures her election in November. The 29-year-old first-time candidate captured 51% of the vote to DeGette’s 42%, with Colorado Public Radio reporting that Kiros led by nearly 5,000 votes as ballots were counted. DeGette, first elected to Congress in 1996, had rarely faced serious primary challengers in her nearly 30-year career representing Denver.

The results signal a generational shift. Democratic voters are increasingly turning to younger, more aggressive candidates willing to take on their party’s aging establishment. Kiros’s victory paralleled similar upsets in New York, where democratic socialist Darializa Avila Chevalier defeated Rep. Adriano Espaillat, chair of the Congressional Hispanic Caucus, in the 13th District last week. Both races reflected growing frustration among Democratic voters with party leadership in the wake of President Donald Trump’s election.

From Law Firm Firing to Congressional Victory

Kiros was born in Ethiopia in 1997-the year DeGette arrived in Congress-and graduated from law school at the University of Notre Dame in 2022. She immigrated to the United States from Ethiopia as a baby and worked as an associate at a large law firm in New York City before being fired in 2023. The New York law firm fired Kiros after she wrote a blog post rejecting accusations that law students who protested Israel’s counterattack after 7 October were antisemitic and refused to take the post down. She then went into politics, later becoming a PhD student and barista before launching her campaign against DeGette.

After announcing her run for Congress, Kiros picked up endorsements from progressive senator Bernie Sanders, as well as the Democratic Socialists of America and Justice Democrats, progressive groups that had also been involved in New York’s primaries. Sanders’s backing helped fuel her campaign alongside grassroots organizing. Despite this significant spending advantage by establishment forces, Kiros prevailed through grassroots organizing. Her campaign reported that volunteers knocked on 100,000 doors.

“You chose fresh, energetic, and bold leadership,” Weiser told supporters at his election night watch party in Denver, describing a campaign that defied early predictions of an easy Bennet victory.

Corporate Money and Generational Challenge

Kiros sought to mount a generational challenge to the 68-year-old DeGette, a member of the congressional progressive caucus who supported key progressive policies like Medicare for all and abolishing ICE. Though Kiros and DeGette were largely aligned on major policy issues-both opposed the Trump administration’s immigration agenda and supported Medicare for All-Kiros singled out DeGette’s acceptance of campaign funds from corporate political action committees. She particularly criticized contributions from the healthcare industry, arguing that the Democratic Party had failed to address systemic problems and that corporate influence needed removal from politics.

DeGette, 68, is the top Democrat on an influential subcommittee overseeing healthcare and has pledged to hold hearings on Medicare for All if Democrats retake the House. She argued that corporate contributions did not influence her votes and that her experience was essential to meet current challenges. Since Donald Trump returned to the White House, Democratic voters have increasingly turned to younger, more aggressive candidates willing to take on their party’s aging establishment.

Outside groups poured a last-minute influx of money into the race to support DeGette and oppose Kiros. Pro-Choice Majority Action, a PAC linked to Elect Democratic Women, spent over $1.5 million in the final two weeks of the campaign. Despite this significant spending, Kiros prevailed in a district that encompasses most of Denver and is heavily Democratic, positioning her as the Democratic nominee for the general election in November.

Palestine Activism Central to Campaign

Kiros made concerns about US support for Israel prominent in her campaign. Both Kiros and Chevalier made pro-Palestine activism central to their campaigns, reflecting a broader shift among younger progressive voters. In a statement, Justice Democrats praised Kiros for having “built a movement that inspired Denverites to remember they themselves have the power to transform what kind of Democratic Party they want to be represented by.” The group’s executive director, Alexandra Rojas, emphasized that progressive candidates continue winning because Democratic voters demand leaders who challenge corporations, war lobbies, and aggressive immigration enforcement.

The following year after graduating law school, she wrote a blog post rejecting accusations that law students who protested Israel’s counterattack after 7 October were antisemitic. This stance, which cost her the law firm position, became a defining element of her political identity and campaign message. Her willingness to take controversial positions on foreign policy resonated with Denver voters seeking bolder leadership from their representatives.

Parallel Gubernatorial Upset Shakes Colorado Politics

Colorado’s Democratic primary election on June 30 delivered another major upset beyond Kiros’s victory. Attorney General Phil Weiser won the gubernatorial nomination over US Senator Michael Bennet. The results signal a shift in the state’s political landscape, with both moderate and progressive candidates finding support among party voters.

Weiser, who has served as Colorado’s attorney general since 2019, secured 55% of the vote compared to Bennet’s 45%, according to Colorado Public Radio. The race drew significant spending and attention, with Weiser pitching himself as a fighter willing to stand up to the Trump administration through his record of lawsuits challenging federal policies. Bennet, a three-term senator, had entered the race as an establishment favorite with greater name recognition and resources. Yet Weiser’s support in the Denver metro area and along the I-70 corridor from Eagle County west to the Utah border proved decisive.

Given Colorado’s blue-leaning electorate, Weiser is heavily favored to win the governor’s office in November to replace term-limited Democratic Gov. Jared Polis. The twin upsets of establishment figures in both the gubernatorial and congressional races demonstrate shifting voter priorities across the state’s Democratic base.

National Progressive Wave Builds Momentum

Kiros’s victory adds to mounting evidence of a national progressive wave challenging Democratic establishment figures. The pattern extends beyond Colorado and New York, reflecting broader dissatisfaction among party voters with traditional leadership approaches. Younger candidates emphasizing economic populism, opposition to corporate influence, and more confrontational foreign policy stances have found receptive audiences in Democratic primaries across the country.

At her election night celebration, Kiros told supporters, “Denver voters of all ages, of all races, of all religions sent a clear message.”

The district that encompasses most of Denver is heavily Democratic, making Kiros’s November general election victory nearly certain. Her campaign demonstrated that grassroots organizing and small-dollar donations can overcome significant establishment spending advantages when candidates articulate clear generational and policy contrasts with incumbents. The combination of economic populism, foreign policy criticism, and rejection of corporate money proved decisive in unseating DeGette despite her nearly three-decade tenure and progressive voting record.