With Donald Trump’s return to the White House for a second term, global markets and policymakers are reassessing the trajectory of U.S. trade policy. At the center of this reevaluation is the renewed emphasis on aggressive tariff measures that defined Trump’s first term. This article examines the rationale behind Trump’s tariff-centric approach, explores the economic and geopolitical ramifications of its revival, and proposes strategic responses for the Korean government and businesses.