This event involves China's trade relationship with Russia and response to Trump tariff threats - entirely international affairs with zero direct impact on US constitutional structures. Mechanism is 'norm_erosion_only' but applies to international trade norms, not US constitutional norms. Scope is international with moderate population, but no US constitutional drivers are triggered: no election interference, no rule of law degradation, no separation of powers issues, no civil rights impacts, no institutional capture, no corruption, no violence. All seven drivers score 0. The mechanism modifier is 0.0 because norm erosion without institutional damage doesn't apply to foreign bilateral trade decisions. A-score: 0. B-score shows moderate hype (Layer 1: 2.25/5 avg) around Trump/China/Russia narrative with some strategic framing (Layer 2: 1.75/5 avg) and low intentionality (4/15). Final B-score: 12.4. This is classic geopolitical noise - foreign nations conducting trade as usual, framed as 'defiance' to generate clicks. No US constitutional damage mechanism exists.