All three cited sources are reachable and every quote is genuine (verified verbatim), and they document real LEADERSHIP by Schatz, not a mere vote or expression of support. The PRIMARY source (Schatz's own Senate office) is titled "Schatz Leads Group Of 49 Senators In Announcing Amendment To Reaffirm U.S. Support For A Two-State Solution" and states he "led a majority of the Senate Democratic Caucus in announcing plans to file an amendment to the forthcoming national security supplemental package" reiterating longstanding U.S. support for a two-state solution. Roll Call ("Schatz says two-state solution amendment has 48 co-sponsors") confirms he authored it and gathered 48 co-sponsors. Jewish Insider ("49 Senate Democrats join amendment affirming support for two-state solution") confirms the amendment was "legislation from Sen. Brian Schatz" with nearly the entire Democratic caucus joining. This is clear authorship and coalition-building (49 senators) that satisfies the CHAMPIONED bar (sponsored/authored/led) well beyond a single vote or supporter role. The disclosed nuance — Schatz declined to force a floor vote and treated it largely as a messaging matter, with no evidence of a vote or enactment — is consistent with the promise, which was to "advance an amendment," not to pass one; announcing/introducing an amendment he authored with a 49-senator coalition is advancing it. Confidence held at 0.85 because leadership is well-documented but the effort's procedural advancement stopped at the announcement/coalition stage without a floor vote.