Trump tariffsSeoul says it will only invest in commercially viable projectsSouth Korean President Lee Jae Myung gestures as he meets with U. S. President Donald Trump on the sidelines of the Asia-Pacific Economic Cooperation leaders' summit in Gyeongju, South Korea, on Oct. 29, 2025. KIM JAEWONOctober 1, 2026 09:00 JSTSEOUL -- South Korea will spend $120 billion in the U. S. to build eight nuclear power plants as part of an agreement to invest $350 billion in exchange for lower tariffs.