Independently verified all three cited sources as real, live, and accurately quoted. The NATO official transcript (PRIMARY) confirms Stoltenberg telling Trump allies 'will have added 100 billion more into their defence budgets since you took office.' FactCheck.org (REPUTABLE_SECONDARY) confirms non-US allies increased defense spending by '$40 billion, or 15%, from 2016 to 2019' and that 'nine of the 29 member countries met the 2% goal in 2019.' The Newsweek article is a real, matching source. Trump made NATO burden-sharing a signature, relentlessly-pursued cause across his 2017-2021 term, publicly pressing allies at the 2017/2018/2019 summits to pay their 'fair share' (the 2% of GDP guideline). He actively LED and DROVE the effort rather than casting a single supporting vote, so this exceeds ATTEMPTED. The full substantive goal (all allies at their fair share) was NOT achieved — most members remained below 2% by the end of his term — and analysts note part of the upward trend began in 2014 (post-Crimea, pre-Trump), so this is CHAMPIONED, not FULL. Fairness check under a party-neutral standard: a president of either party who made an issue a signature cause across a full term, publicly leading it with measurable partial results, would earn CHAMPIONED; the disputed causation caps it below FULL but does not undercut the undisputed leadership. The prior rating stands; confidence trimmed marginally (0.90 to 0.89) to reflect the genuine 'little to do with Trump' counter-narrative on results, which affects a FULL claim more than the CHAMPIONED leadership finding.