Kenneth Robert Buck is an American lawyer and politician who represented Colorado's 4th congressional district in the United States House of Representatives from 2015 until his resignation in 2024. Buck served as chair of the Colorado Republican Party, from 2019 to 2021.
Raised
FEC data pending
Spent
FEC data pending
Outside spending
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0 votes · cycle 2026 · Mar 30, 2026
Some data sources have not been ingested for this politician.
Funding Transparency
No flagsVote Independence
Moderate concernVotes with Republicans 85% of the time — 8 breaks from the majority across 52 roll calls.
Timing Patterns
No flagsLobby Influence
No flagsPeer Standing
No flagsParty alignment
How often this politician sides with their party on roll calls where the party mostly agreed. This is a notably high deviation rate.
Legislative focus
Lobbying activity
583clients
583 bill references on record · 583 linked to specific bills
American Committee For The Weizmann Institute Of Science
Filed by Vitello Consulting
American Committee For The Weizmann Institute Of Science
Filed by Williams And Jensen, PLLC
American Committee For The Weizmann Institute Of Science
Filed by Richard Burness
American Committee For The Weizmann Institute Of Science
Filed by Nxg Global Law & Compliance Pllc
American Committee For The Weizmann Institute Of Science
Filed by Downs Government Affairs
American Committee For The Weizmann Institute Of Science
Filed by Hutton Strategies
American Committee For The Weizmann Institute Of Science
Filed by Sbl Strategies, Llc
American Committee For The Weizmann Institute Of Science
Filed by Endgame Strategies, Llc
American Committee For The Weizmann Institute Of Science
Filed by Step Up Advocacy
American Committee For The Weizmann Institute Of Science
Filed by Mg Housing Strategies LLC
Source: federal lobbying disclosures and congressional vote records.
55 bills voted on · 9 lobbied
Voted on by
Aaron Bean
Abigail Davis Spanberger
Adam B. Schiff
Adam Smith
+529 more
Lobbied by
American Kratom Association
American Superconductor
Coalition For Responsible Waste Incineration
Coalition For Student Opportunity And Success
+9 more
Voted on by
Aaron Bean
Abigail Davis Spanberger
Adam B. Schiff
Adam Smith
+435 more
Lobbied by
American Institutes For Research (Air)
City Of Lakeville, Mn
Coalition For Responsible Waste Incineration
National Council For Community And Education Partnerships
+2 more
Voted on by
Abigail Davis Spanberger
Adam B. Schiff
Adam Kinzinger
Adam Smith
+427 more
Lobbied by
American Committee For The Weizmann Institute Of Science
Coalition For Responsible Waste Incineration
Nextgen Climate Action
Partnership To Fight Chronic Disease
+1 more
Voted on by
Aaron Bean
Abigail Davis Spanberger
Adam B. Schiff
Adam Smith
+434 more
Lobbied by
Coalition For Responsible Waste Incineration
Voted on by
Abigail Davis Spanberger
Adam B. Schiff
Adam Kinzinger
Adam Smith
+429 more
Lobbied by
Desimone Consulting Group On Behalf Of The Northwest Public Power Association
Voted on by
Abigail Davis Spanberger
Adam B. Schiff
Adam Kinzinger
Adam Smith
+426 more
Lobbied by
Association Of Universities For Research In Astronomy, Inc.
Voted on by
Aaron Bean
Abigail Davis Spanberger
Adam B. Schiff
Adam Smith
+427 more
Lobbied by
Coalition For Responsible Waste Incineration
Voted on by
Aaron Bean
Abigail Davis Spanberger
Adam B. Schiff
Adam Smith
+436 more
Lobbied by
Nextgen Climate Action
Voted on by
Abigail Davis Spanberger
Adam B. Schiff
Adam Kinzinger
Adam Smith
+428 more
Lobbied by
Coalition For Responsible Waste Incineration
Voted on by
Abigail Davis Spanberger
Adam B. Schiff
Adam Kinzinger
Adam Smith
+426 more
Sources and notes
Campaign finance data comes from FEC.gov filings, while available vote records come from Congress.gov and the U.S. Senate roll call feed. Figures stay as reported by those sources. House votes come from Congress.gov. Senate votes come from the official roll call feed. Coverage may be incomplete for some profiles. Recent profile snapshots are reused briefly so repeat views stay fast and consistent.