A veteran Democratic congresswoman in Denver has lost her party's primary to a challenger from her left, in one of the more striking incumbent defeats of the 2026 election cycle so far.
The result
Melat Kiros, a 29-year-old attorney who campaigned as a democratic socialist, defeated Rep. Diana DeGette in the Democratic primary for Colorado's 1st Congressional District, NBC News reported. NBC put Kiros's share of the vote at about 48.6 percent to DeGette's 44.2 percent. DeGette, who was first elected in 1996 and had represented the Denver-based seat for some three decades, conceded the race, according to Colorado Public Radio.
Who Melat Kiros is
Kiros, who her campaign says immigrated from Ethiopia as a child and grew up in the Denver area, is a lawyer and a doctoral student. She ran as a member of the Democratic Socialists of America and centered her campaign on a call to refuse corporate political-action-committee money and on policies including "Medicare for All." Her platform, as described in her campaign and in news coverage, also included restricting the influence of money in politics and other positions associated with the party's progressive wing. She was endorsed by Senator Bernie Sanders, the Vermont independent, and by the group Justice Democrats.
DeGette, for her part, was among the more senior members of the House and had built a long record on health and abortion-rights issues. Her defeat adds to a small number of congressional incumbents turned out by primary voters this cycle, and fits a pattern in some strongly Democratic urban districts, where challengers running to the left have unseated established figures.
What happens next
Winning the primary does not, by itself, send Kiros to Washington: she must still win the general election in November. But the district's makeup makes her the clear favorite. Colorado's 1st is one of the most reliably Democratic seats in the country — DeGette won it by a wide margin in 2024 — and the party has held it for decades. Barring a major surprise, the Democratic nominee is expected to prevail in the fall.
If she does win, Kiros, at 29, would be among the youngest members of the incoming Congress. Some outlets have described her as potentially the first member of "Generation Z" — those born in the late 1990s and after — to be elected as a woman, though at 29 she sits near the boundary between that generation and millennials, and such labels vary by definition.
For now, the result stands as a notable marker: a long-serving incumbent unseated in a low-turnout summer primary, and a fresh test, in November and beyond, of how a candidate running well to her party's left fares once in office.
