DENVER — Democratic voters in Colorado’s 1st Congressional District delivered one of the biggest primary upsets of the 2026 election cycle Tuesday, ousting 15-term Rep. Diana DeGette in favor of democratic socialist Melat Kiros despite renewed scrutiny over Kiros’ past comments on Hamas, the Sept. 11 terrorist attacks, and antisemitism.
Kiros, a former attorney, Ph.D. student and member of the Democratic Socialists of America, defeated DeGette after running a campaign centered on sweeping progressive reforms and a sharp break from the congresswoman’s approach to U.S. policy toward Israel.
Because Colorado’s 1st Congressional District is overwhelmingly Democratic, Kiros is virtually guaranteed to defeat Republican nominee Christy Peterson in November. If elected, she would become the first Gen Z woman to serve in Congress.
Progressive Defeats Progressive
Although DeGette was frequently described as part of the Democratic establishment because of her nearly three decades in Congress, she has long ranked among the House’s most liberal members.
A member of the Congressional Progressive Caucus, DeGette has consistently supported progressive positions on abortion rights, healthcare, and other domestic issues.
The campaign’s defining ideological divide instead centered largely on Israel.
While DeGette supported continued U.S. funding for Israel’s missile-defense systems, including Iron Dome, Kiros called for a complete embargo on U.S. arms sales to Israel and argued the United States should fundamentally rethink its Middle East policy.
Campaign Focused On Left-Wing Agenda
Kiros campaigned on a platform that included abolishing U.S. Immigration and Customs Enforcement, establishing Medicare for All, rejecting corporate political action committee money, and refusing contributions from pro-Israel organizations such as AIPAC.
She argued that Democratic leaders have not gone far enough in addressing economic inequality, housing costs, and healthcare affordability.
Her victory adds to a broader series of progressive primary wins across the country that have highlighted growing dissatisfaction among some Democratic voters with longtime incumbents.
Past Comments Drew National Attention
The closing weeks of the race were dominated by renewed attention to statements Kiros made in 2023 following Hamas’ Oct. 7 attack on Israel.
After publishing an open letter that argued pro-Palestinian student protesters calling for the elimination of Israel were not engaging in antisemitism and that critics said defended Hamas, Kiros was fired from her position at the New York law firm Sidley Austin.
In a later interview with Denver’s 9NEWS, she described Hamas’ Oct. 7 attack as the “inevitable consequence of apartheid.” When asked whether the Sept. 11, 2001, terrorist attacks were likewise an inevitable consequence of U.S. foreign policy, Kiros agreed that they were.
During the same interview, Kiros also declined to characterize the firebombing of demonstrators marching in support of Israeli hostages as an antisemitic attack, saying only that the suspect had targeted innocent people because of what they believed.
Her comments drew sharp criticism from Republicans and some Democrats, while supporters argued they reflected an attempt to explain historical causes rather than justify acts of terrorism.
A New Generation Of Democratic Leadership
Kiros’ victory underscores the continued strength of the Democratic Party’s progressive wing, particularly in safely Democratic districts where primary elections often determine the eventual winner.
Unlike several recent high-profile challenges that pitted left-wing candidates against centrists, the Colorado contest highlighted divisions within the party’s progressive coalition over foreign policy, generational change, and strategy.
DeGette’s defeat will end the congressional career of one of the House’s longest-serving members while paving the way for one of its youngest lawmakers to take her place.
The race is expected to be closely watched as a measure of the growing influence of younger progressive activists.
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