The first congressional district in Colorado looks a lot less like a safe incumbent hold, and prediction markets are treating Melat Kiros like the candidate to beat.
Rep. Diana DeGette, a 15-term Democrat with one of the deepest resumes in the state, is now facing what appears to be her strongest primary test yet. Markets have Kiros ahead by around 75% on Kalshi and 76% on Polymarket heading into Tuesday’s primary.
The two had been neck and neck until recently, when Kiros began pulling away. The push comes as progressive candidates across the country surge, including the recent sweep in New York City districts.
Kiros gets the market edge
The market move is the first thing that jumps out here. Kiros’ rise to favorite status suggests traders see the same progressive energy that has been moving races elsewhere, especially in New York, where the left flank just had a strong night.
In Colorado, that wave is now showing up in a race that would once have looked far more settled.
That is what makes this race notable: DeGette is not some vulnerable freshman but a longtime incumbent who has built enormous institutional strength over 15 terms. If the markets are still leaning toward Kiros anyway, that means something has clearly shifted underneath the race.
And the markets have real volume, with $533,700 on Kalshi and $227,600 on Polymarket.
The progressive lane
Kiros also benefits from the same broader mood that has helped other left-leaning candidates break through. Attorney General Phil Weiser’s late surge in the gubernatorial primary is part of the same pattern, with Colorado Democrats showing a willingness to move toward a more progressive option when the race offers that opening.
The New York primaries only reinforce the point, since they showed how quickly the left can consolidate around challengers who present a sharper ideological contrast.
That does not automatically mean a Kiros victory is inevitable, but it does suggest the momentum is real. When a candidate can ride a national progressive mood while also building a local case against a veteran incumbent, the market will notice.
Polls still matter
The NYT polling page for Colorado’s 1st district is important here because it reminds us this race is not just a market story. The poll picture has been competitive enough to keep the challenge credible, and that is part of why the markets have been willing to price Kiros as the favorite rather than a long shot.
The market is not inventing the race, simply amplifying an undercurrent that the polls have already suggested is worth watching.
That combination matters because it keeps the story from turning into pure hype. A serious incumbent challenge backed by both polling and market action is exactly the kind of primary fight that deserves attention.
DeGette is in a real fight, and prediction markets are leaning into the idea that Colorado’s Democratic electorate may be open to another progressive turn. If Kiros wins, it will look less like a random upset and more like Colorado joining a wave that is reshaping how Democrats choose their nominees.
