Adversarial verification upholds CHAMPIONED. Source 1 (Whitehouse Senate press release, PRIMARY) was fetched and CONFIRMS every promised element verbatim: the Save Our Future Act was introduced with Sen. Schatz on June 16, 2021 (the exact promise date), assessing fees on large corporations for greenhouse-gas emissions and air pollution, cutting emissions "roughly 50 percent after ten years," and returning revenue via biannual rebate checks to low- and middle-income households ($800/adult, $300/dependent). The cited quote appears word-for-word. Source 2 (Whitehouse EPA methane-fee release, PRIMARY) was fetched and CONFIRMS verbatim that "Whitehouse was the author of the original methane fee proposal that was negotiated into the Inflation Reduction Act and passed into law in 2022," substantiating the partial enacted win that elevates this above ATTEMPTED. Source 3 (Congress.gov S.2085) returned HTTP 403 to automated fetch — a standard bot-block on a real, live public page, not a dead link — and its cited content (Save Our Future Act, introduced 6/16/2021, "read twice and referred to the Committee on Finance," no vote, not enacted) was independently corroborated via web search including a Congress.gov result snippet. The promised action was delivered exactly as stated; Whitehouse was the lead author and drove the polluter-fee effort, and a core element (the methane fee) became law in the IRA, while the standalone bill died in the Finance Committee. CHAMPIONED accurately reflects leadership plus a partial legislative win without overstating (not FULL, since the Save Our Future Act itself never became law). No fabricated quotes, no unsupported outcome, no unreachable evidence that is load-bearing for the disputed points.