Colorado Democratic Socialist Upset Defeats Incumbent Diana DeGette

Melat Kiros, a 29‑year‑old former attorney backed by the Democratic Socialists of America (DSA), won the Democratic primary in Colorado’s 1st Congressional District, defeating 30‑year incumbent Rep. Diana DeGette 49.3% to 43.5%. The Associated Press called the race, marking the latest in a series of DSA victories that began with wins in New York City primaries.

The Colorado upset follows recent insurgent campaigns by DSA‑aligned candidates such as Darializa Avila Chevalier in New York, and reflects a growing push by the party’s left wing to unseat establishment Democrats. Supporters cite figures like New York Mayor Zohran Mamdani and Justice Democrats, while critics frame the movement as a shift toward more radical policies within the Democratic Party. The result is seen as a signal that urban, heavily Democratic districts are increasingly open to candidates advocating Medicare for All, ICE abolition, and other progressive platforms, potentially reshaping the party’s congressional caucus.

Conservative commentators have alarmed that the DSA’s expanding influence signals a broader ideological battle, describing the winners as “communists” seeking to overhaul the party. The primary outcome adds to the narrative of an internal civil war within the Democrats, with both sides preparing for upcoming general elections.