The Trump administration’s 2025 National Security Strategy represents the most dramatic departure from post-Cold War American foreign policy consensus in modern history—a finding upon which ten distinct sources across the political spectrum largely agree. Released December 4, 2025, the 29-page document abandons the “great power competition” framework that Trump’s own 2017 NSS established with bipartisan support, softens characterizations of Russia while harshening criticism of European allies, and elevates the Western Hemisphere to the top regional priority through an unprecedented “Trump Corollary” to the Monroe Doctrine. Russia’s Kremlin spokesman Dmitry Peskov welcomed the strategy as “largely consistent with our vision”—the first time Moscow has so “fulsomely praised” such a document from its former Cold War adversary. This analysis applies a rigorous fact-checking framework to examine where sources agree on facts, where they diverge in interpretation, how accurately commentary reflects the primary document, and where readers should exercise caution.