Adversarial re-check upholds CHAMPIONED. The 2019 promise is a belief/framing statement that the Green New Deal is a 'crucial framework' for climate action. Two data points cut against a literal reading: Biden never enacted the GND resolution and, in the Sept. 2020 debate, explicitly said 'No, I don't support the Green New Deal' and 'The Green New Deal is not my plan' — so FULL is wrong. But the disavowal was a rhetorical distancing from a toxic label, not an abandonment of the framework's substance: NBC's fact-check ('His plan borrows heavily from it') and Biden's own campaign confirm he used the GND as a framework. As president he then actively LED, not merely voted for, the most consequential U.S. climate effort in history — driving and signing the Inflation Reduction Act (~$369B, 'the most significant investment in U.S. history to tackle the climate crisis'), setting a 50-52% 2030 emissions-cut target and net-zero by 2050, and rejoining Paris. Reputable coverage confirms 'many of [the GND's] key elements resurfaced in the Inflation Reduction Act.' Applying a party-neutral standard, a politician who disavows a label but then drives landmark legislation embodying that framework's substance has championed it, not merely partially kept it. Confidence set at 0.7 (down from 0.72) to reflect the genuine PARTIAL-vs-CHAMPIONED tension created by the 2020 label disavowal. All three prior-cited sources were independently verified as live and accurately quoted.