Robert William Chamberlin

Registered Lobbyist
Disclosed Prior Positions
Chief Counsel, US Senate Commerce Committee; Senior Counsel, US Senate Commerce Committee; Assistant Counsel, House Transportation and Infrastructure Committtee.
Chief Counsel, US Senate Commerce Committee; Senior Counsel, US Senate Commerce Committee; Assistant Counsel, House Transportation and Infrastructure Committee.
Chief Counsel, US Senate Commerce Committee; Senior Counsel, US Senate Commerce Committee; Asst. Counsel, House Transportation and Infrastructure Committee.
Chief Counsel, US Senate Commerce Committee, Senior Counsel, US Senate Commerce Committee, Asst. Counsel, House Transportation and Infrastructure Committee
Lobby Filings
1,233
Clients
90
Firms
1
Years Active
2019–2026
Total Contributed
$282,476
Contributions
138
Recipients
37
Contrib Filings
16
Top Recipient Legislators
LegislatorPtyStTotal
John Thune R SD $27,800
Eric Schmitt R MO $14,300
Thomas Tillis R NC $11,100
Ted Cruz R TX $6,800
Deb Fischer R NE $6,750
Bill Hagerty R TN $6,000
Todd Young R IN $5,000
Cindy Hyde-Smith R MS $5,000
Katie Britt R AL $4,300
Ben Sasse R NE $4,000
Jerry Moran R KS $4,000
Tim Scott R SC $3,500
Tim Sheehy R MT $3,300
Roger Wicker R MS $3,000
Susan Collins R ME $3,000
Marco Rubio R FL $3,000
Garret Graves R LA $3,000
Steve Daines R MT $3,000
John Cornyn R TX $3,000
Paul Laxalt R NV $2,900
Top Committees / PACs
PayeeCountTotal
NRSC 27 $100,626
WINNING FOR AMERICA 4 $13,000
HEARTLAND VALUES 2 $10,000
FOJT 2 $7,000
NC RED 2 $6,000
ALABAMA FIRST 3 $5,800
WALKER FOR SENATE 2 $5,800
FRIENDS OF JOHN THUNE 1 $5,300
OOHRAH PAC 2 $5,000
HEARTLAND VALUES PAC 1 $5,000
HYDE-SMITH FOR SENATE 2 $5,000
FISCHER FOR SENATE 3 $4,000
TEAM HAGERTY 2 $4,000
MORAN VICTORY 2 $4,000
WINNING FOR AMERICA PAC 1 $3,300

Lobbying Filings

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Political Contributions

Recipient / Honoree Legislator Payee / Committee Date Amount
John Thune John Thune (R, SD) FOJT Dec 18, 2025 $3,500
John Thune John Thune (R, SD) FOJT Dec 18, 2025 $3,500
John Cornyn John Cornyn (R, TX) CORNYN VICTORY COMMITTEE Dec 18, 2025 $1,500
John Cornyn John Cornyn (R, TX) CORNYN VICTORY COMMITTEE Dec 18, 2025 $1,500
Bill Hagerty Bill Hagerty (R, TN) TEAM HAGERTY Dec 15, 2025 $2,000
Bill Hagerty Bill Hagerty (R, TN) TEAM HAGERTY Dec 15, 2025 $2,000
Susan Collins Susan Collins (R, ME) COLLINS FOR SENATE Nov 6, 2025 $1,000
Susan Collins Susan Collins (R, ME) COLLINS FOR SENATE Nov 6, 2025 $1,000
NRSC — NRSC Oct 23, 2025 $3,750
NRSC — NRSC Oct 23, 2025 $3,750
Page 1 of 14  ·  138 contributions Next

Contribution Filings (LD-203)

YearPeriodPostedStatusDoc
2025 Year End May 12, 2026 Active
2025 Year End Mar 3, 2026 Active
2025 Mid Year Oct 7, 2025 Active
2024 Year End Apr 21, 2025 Active
2024 Mid Year Sep 13, 2024 Active
2023 Year End Jan 30, 2024 Active
2023 Mid Year Jul 31, 2023 Active
2022 Year End Jan 26, 2023 Active
2022 Mid Year Jul 26, 2022 Active
2021 Year End Jun 10, 2022 Active
2021 Year End Jan 31, 2022 Active
2021 Mid Year Nov 16, 2021 Active
2021 Mid Year Aug 2, 2021 Active
2020 Year End Jan 29, 2021 Active
2020 Mid Year Jul 31, 2020 Active
2019 Year End Jan 30, 2020 Active