Adversarial re-check confirms the outcome but corrects the sources. Biden's specific 2020 poverty-targeted plan (a special minimum benefit at 125% of the poverty line, a switch to the CPI-E cost-of-living index, and age-based benefit bumps) that campaign analyses projected would lift hundreds of thousands of seniors out of poverty was NEVER enacted by Congress. The only Social Security benefit expansion signed into law was the narrow bipartisan Social Security Fairness Act (signed Jan 5, 2025), which repealed the WEP and GPO and boosted benefits for roughly 2.5-3 million public-sector retirees. That bill is arguably regressive and does not target the poorest seniors, so the specific 'half a million out of poverty by 2030' metric was not delivered. However, a real, enacted expansion of Social Security benefits DID land, which is why nonpartisan PolitiFact rates the analogous promise a 'Compromise' -- expressly citing the Fairness Act as a limited but genuine expansion while the broad plan failed. Under a consistent cross-party standard (a Republican with the identical record -- broad plan dies, narrow bipartisan benefit-boost bill enacted -- would earn the same), this maps to PARTIAL (+0.5): some of the promise kept (benefits expanded, millions helped), but not all (no poverty-targeted plan, specific metric unmet). REVISE rather than CONFIRM because the prior rating's first-source quote concatenated two separate update headlines from the PolitiFact page with an ellipsis, reading as one continuous statement; replaced with accurate, verifiable quotes. Confidence held at ~0.7 given genuine ambiguity over whether the tangential Fairness Act fully counts toward this specifically poverty-framed promise.