Independently verified via GPO/Library of Congress primary sources (govinfo.gov). Jared Huffman is the lead House sponsor of the exact bill named in the promise: H.R.2519, the 'Keep It in the Ground Act of 2021,' introduced April 14, 2021 (the promise year), 'To prohibit drilling in the outer Continental Shelf, to prohibit coal leases on Federal land, and for other purposes,' referred to the Committee on Natural Resources. He drove the same effort across Congresses as lead sponsor of H.R.10489, the 'Keep It in the Ground Act of 2023' (118th Congress), again referred to the Committee on Natural Resources. This is active leadership (authoring and leading, well beyond a single supporting vote), but the 'pass' half was never achieved — both bills died in committee with no floor vote and never became law. That is the textbook CHAMPIONED case: actively led/drove the effort short of full enactment. The prior rating's congress.gov and huffman.house.gov URLs returned HTTP 403 to my fetcher (anti-scraping, not fabricated), but the underlying facts are confirmed through the equivalent GPO primary source. Nonpartisan check: a member of either party with an identical record — lead sponsor of the named bill across multiple Congresses, bill dies in committee — would receive CHAMPIONED under the same standard; the rating is neither partisan-lenient nor harsh. FULL is unwarranted (no passage); PARTIAL/ATTEMPTED would understate his lead sponsorship. Confidence held at 0.95.