Colorado’s 4th Congressional District has become a high‑profile political battleground in recent election cycles, drawing national attention thanks to its solid Republican lean and high‑stakes contests. The district includes the rural Eastern Plains and parts of the Denver exurbs, with voters consistently favoring conservative candidates.
With the retirement of long‑time Republican Rep. Ken Buck, the seat opened up for new contenders in 2024. A special election to fill his remaining term was held in June 2024, followed by the regular general election later that year.
Lauren Boebert (Republican)
Republican firebrand Lauren Boebert — previously representing Colorado’s 3rd District — made a controversial decision to switch districts and run in the 4th after Buck’s departure. She won the GOP primary and then the general election later in 2024.
Boebert has become a lightning rod in Colorado politics. Known for hard‑right positions on issues like border security and government spending, she’s frequently spotlighted by both supporters and critics for her outspoken rhetoric.
From an opposition research perspective, her critics often focus on:
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District hopping — moving from her former district to run in a safer Republican seat, which opponents argue prioritizes personal political survival over local representation.
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Polarizing statements — Boebert’s messaging is designed to energize her base but has also drawn criticism for alienating moderates.
Supporters counter that her strong conservative stances are exactly what voters in eastern Colorado want, pointing to her primary victory as proof of voter confidence.
Trisha Calvarese (Democrat)
Democrat Trisha Calvarese emerged as the Democratic nominee in 2024 and ran a campaign focused on everyday economic issues and reproductive rights.
Calvarese’s platform emphasizes:
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Protecting reproductive freedom, advocating for federal protections against abortion restrictions — a notable contrast to her Republican opponent’s track record.
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Addressing cost of living pressures, including housing and healthcare affordability.
Opposition researchers might highlight that Calvarese faces a steep uphill battle in a district that leans strongly Republican, which historically makes it difficult for Democratic challengers to win statewide or congressional seats here.
Third‑Party and Independent Challengers
Several non‑major‑party candidates also pursued the seat in 2024:
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Frank Atwood (Approval Voting Party) campaigned on electoral reform and shaking up the two‑party system.
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Hannah Goodman ran under the Libertarian banner, promoting significantly smaller government and individual freedoms.
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Paul Noel Fiorino appeared on the ballot representing the Unity Party, emphasizing varied reform ideas.
While none of these candidates were major contenders in vote totals, they can influence margins in close elections by drawing support from voters disenchanted with the two dominant parties.
2024 Special Election: What Happened
Before the general election, a special election was held to fill the remainder of Buck’s term. Republican Greg Lopez won with a decisive majority, reflecting the district’s conservative tilt.
What This Means for Voters
For voters in Colorado’s 4th District, the contrast between Boebert’s hard‑right approach and Calvarese’s more centrist, issue‑focused campaign offers a clear ideological choice. Third‑party challengers add nuance but historically have not shifted outcomes in this heavily Republican district.
Whether you’re researching for engagement, persuasion, or simple civic awareness, understanding each candidate’s background and positions helps illuminate what’s at stake in this key Colorado Congressional race.