In this column, the author reflects on the seismic changes in global trade dynamics due to Trump's presidency, particularly focusing on his long-standing views on tariffs and trade agreements. The article recalls how Trump, even as a private citizen in 1987, advocated for imposing taxes on wealthy nations benefiting from U.S. military support, a concept that has reemerged in his current governance through tariff wars against various countries, including South Korea. After a recent Supreme Court ruling that the U.S. may impose new tariffs, concerns are rising in South Korea about potentially higher tariffs than previously agreed upon, alongside fears of retaliatory measures linked to U.S.-Iran conflict.