All three cited sources are reachable and every quoted passage appears verbatim on the respective pages. The outcome — long championing repeal of WEP/GPO, culminating in the Social Security Fairness Act being signed into law on January 5, 2025 — is corroborated by all three sources. The CHAMPIONED-level leadership is documented in the PRIMARY source (Collins's office), which states she held the first-ever Senate hearing on the WEP and GPO in 2003, first introduced the Social Security Fairness Act in 2005 with Sen. Feinstein, and co-authored the enacted bill with Sen. Sherrod Brown — a two-decade record of leadership beyond a mere yea vote. These are verifiable public-record facts (2003 hearing, 2005 introduction, lead co-sponsorship). The two independent secondary sources confirm the outcome (the Act repeals both provisions and the Senate passed it) but do not themselves attribute leadership to Collins: GovExec only notes her presence at the bill signing, and IAFF does not mention her at all. Because leadership attribution rests primarily on the Senator's own office (though the underlying facts are accurate and independently establishable), confidence is set slightly below the original 0.97, but the CHAMPIONED rating is sound and upheld.