Trump's Greenland Tariff Threat: Reshaping Alliance Dynamics and Global Trade

• US President Donald Trump's tariff threat over Greenland sale signals a structural shift in economic power within alliances, impacting European allies.
• Trade agreements with Washington are no longer seen as stabilizing commitments, as tariffs can be imposed for non-trade objectives.
• Europe faces the collapse of trade agreement commitment functions, issue separability, and institutional asymmetry.
• The article suggests Europe must reclassify US trade commitments as contingent, activate deterrence via the Anti-Coercion Instrument, and diversify trade.
• For other US allies, the episode implies alignment doesn't guarantee predictability, trade agreements become hegemon's options, and accelerates hedging behavior.

Why It Matters: Trump's Greenland tariff threat fundamentally alters alliance logic, making trade agreements instruments of statecraft.