All four cited sources are reachable and support the outcome, and every quoted passage was confirmed against the live pages (Source 2's quote verified in both of its clauses on a targeted re-check). The two PRIMARY Senate-office sources establish genuine leadership, not a mere vote: they explicitly credit Cortez Masto as the AUTHOR/sponsor of the HOME Investment Partnerships Reauthorization and Improvement Act (HOME Act), whose provisions were incorporated into the bipartisan 21st Century ROAD to Housing Act. The two REPUTABLE_SECONDARY sources independently corroborate the enacted law: the Bipartisan Policy Center confirms the Act became law July 11, 2026 and that Section 501 'Reauthorizes the HOME Investment Partnerships (HOME) program' with administrative reforms and expanded eligibility/flexibility; the Urban Institute confirms both chambers passed the Act with the President expected to sign. This exceeds the promise (which was only to INTRODUCE legislation): she authored the bill and drove her provisions into enacted law, meeting the CHAMPIONED leadership bar. Confidence held at 0.9 rather than higher because the 'expanding' element was realized as expanded eligibility/flexibility in a largely administrative reauthorization, with the original bill's $5B annual funding increase folded into the negotiated package rather than passing verbatim — a limitation the rating discloses. The secondary sources do not name Cortez Masto, but the leadership claim is carried by the two primary sources, so this is corroboration rather than a gap.