All three cited sources are reachable and support the CHAMPIONED rating, and every cited quote appears verbatim. Source 2 (warren.senate.gov, dated 2021-04-23, the promise date) contains both quoted phrases exactly: "build or rehabilitate nearly 3 million units over the next decade" and "bring down rents for lower-income and middle-class families by 10% — saving families an average of $100 per month." Source 1 (Senate Banking Committee, 2025-03-11) confirms verbatim that Warren, as Ranking Member, re-introduced the American Housing and Economic Mobility Act with Warnock and Cleaver, documenting the ~3M-unit and ~10%-rent-reduction goals. Source 3 (homebuyer.com tracker) confirms the bill "has not yet been passed into law" and was only "Read twice and referred to the Committee on Finance" (2025-03-11). The CHAMPIONED rating is honestly calibrated and does NOT overstate the evidence: it credits Warren's sustained leadership as lead author/namesake reintroducing the bill across three Congresses while explicitly acknowledging the bill never advanced out of committee, never became law, and delivered no built housing or rent reduction. CHAMPIONED (led/drove beyond merely voting, outcome not achieved) is the correct characterization and is well supported by the primary sources.