The CHAMPIONED outcome is upheld, but the confidence is reduced from 0.85 because the cited source set contains one materially false attribution and one non-verbatim quote. VERIFIED: (1) The core pledge is solid — on 2011-07-11 Blumenthal cosponsored the Whitehouse "sense of the Senate" resolution opposing SS/Medicare cuts in debt-ceiling/deficit-reduction talks; the cited quote appears verbatim on the PRIMARY source. (2) The 2011 debt-ceiling deal (Budget Control Act) concluded those negotiations without cutting SS or Medicare benefits — sequestration exempted Social Security and Medicaid and capped Medicare provider reductions at 2% (Wikipedia confirms the substance, though the cited quote is a light reconstruction of two separate sentences, not verbatim). (3) Blumenthal went beyond keeping the promise: he is the LEAD sponsor of the SWIFT Act (blumenthal.senate.gov, Nov 25 2025, quote verbatim) and personally defended Medicare/Medicaid against cuts on the Senate floor (July 30 2025, quote verbatim). This sustained, leading defense supports CHAMPIONED over a plain FULL. HOWEVER, the rating's fourth source is defective: S.770 (Social Security Expansion Act, 119th Cong.) was introduced by Sanders with cosponsors Warren, Merkley, Welch, Padilla, Smith, Van Hollen, Markey, Booker, Gillibrand, and Whitehouse — Blumenthal is NOT a sponsor or cosponsor (confirmed via FastDemocracy and two independent web searches). The rationale's assertion that he "is a lead sponsor/cosponsor of the Social Security Expansion Act (S.770)" is false, so that citation is dropped. Because the outcome is independently and durably supported by the remaining verbatim-verified PRIMARY sources, this is not UNRATABLE — the promise is clearly ratable and CHAMPIONED stands — but the citation defects warrant lowered confidence.