This event involves Canada preparing retaliatory tariffs in anticipation of potential Trump trade actions. A-score is 0 because this involves no US constitutional damage - it's a foreign government's defensive trade policy preparation in response to anticipated US actions that haven't occurred yet. No election interference, rule of law violations, separation of powers issues, civil rights impacts, or institutional capture are present. The policy_change mechanism doesn't apply to US constitutional framework when it's a Canadian policy response. B-score reaches 15.99 driven by media friendliness (Trump+trade war narrative), timing (anticipatory positioning), and pattern matching (familiar trade war framing). However, this is fundamentally anticipatory diplomatic posturing - a routine aspect of international trade relations where countries signal preparedness for potential actions. The event is noise because: (1) it's anticipatory rather than actual policy implementation, (2) represents standard diplomatic signaling between trading partners, (3) involves no mechanism affecting US constitutional order, and (4) is routine foreign policy practice that generates media attention without substantive constitutional impact.