# Republican Main Street Partnership **Republican Main Street Partnership** is the organisational home of the centre-right, governing-wing faction of House Republicans — the counterpart to the Republican Study Committee and the Freedom Caucus on the party's right. [[Mike Bost]] is recorded in the vault as a member of both it and the Republican Study Committee. It enters the money side of the vault on **2026-10-05**, when its affiliated super PAC disclosed a **$2,000,000** receipt from it. ## The disclosed grant | Item | Detail | |---|---| | Recipient | [[Defending Main Street Super PAC]], FEC committee C00540203 | | Amount | **$2,000,000.00** | | Receipt date | **2026-09-28** | | Disclosed on | the recipient's Form 3X monthly report, file **2016989**, received 2026-10-05, line **SA11AI** | | Contributor entity type on the filing | `ORG` | | Address on the filing | **411 New Jersey Avenue, SE, Washington, DC 20003** — the same address as the recipient | Full analysis: [[Republican Main Street Partnership 2M Defending Main Street October 2026]]. ## Why the grant matters **It is the end of the disclosure chain.** The super PAC must name its contributor, and it did. The organisation that wrote the cheque names nobody. A reader can learn that $2,000,000 reached a super PAC from Republican Main Street Partnership and cannot learn who gave Republican Main Street Partnership $2,000,000. That is the mechanism catalogued under [[Dark Money]], and this is a clean, small-enough instance of it to be legible. > [!note] What this page does not claim > This page has not reviewed Republican Main Street Partnership's own tax filings, donor disclosures or > affiliated-entity structure. Its legal form, fiscal year and revenue are **not** established here, and > the "501(c)(4)" framing common in press coverage of Main Street-aligned entities has not been verified > against a primary document. The one verified fact is the $2,000,000 contribution and the > shared address. ## What to watch - **A second grant to [[Defending Main Street Super PAC]]** before November 3. - **Whether the organisation's own filings become available** and name any funder. - **[[Sarah Chamberlain]]'s roles** across the two entities, which were not verified against a primary document beyond her signature as the super PAC's treasurer. ## See Also - [[Republican Main Street Partnership 2M Defending Main Street October 2026]] - [[Defending Main Street Super PAC]] · [[Sarah Chamberlain]] · [[Mike Bost]] - [[Dark Money]] · [[Super PACs]]