Both cited sources were fetched and independently confirm the CHAMPIONED outcome for THIS promise (to LEAD the effort to reform the filibuster by restoring a "talking filibuster"). The American Prospect piece documents Merkley's 15-year campaign to restore a talking filibuster, his January 2024 book "Filibustered!: How to Fix the Broken Senate and Save America" (with Mike Zamore), his detailed reform plan, and closes with the exact cited quote "I'm going to work like hell." The Roll Call piece corroborates the same leadership, the book, the talking-filibuster proposal, and the 2022 voting-rights effort blocked by Manchin/Sinema; its cited "quote" is the verbatim article headline. Both quotes appear as cited (one a direct Merkley quote, one a verbatim headline used to document the outcome). CHAMPIONED is well-calibrated to a promise whose action is to LEAD, not enact: it captures verifiable sustained leadership while the rationale correctly concedes the reform was not achieved (filibuster stands, no final vote on voting-rights bills). The outcome does not overstate the evidence, so the original rating is upheld.