SEOUL — South Korean President Lee Jae-myung stated that Korean firms would be "very hesitant" to invest in the U.S. following an Immigration and Customs Enforcement (ICE) raid at a Hyundai plant in Georgia. Agents from ICE arrested more than 300 Korean workers at the plant.

President Lee Jae-myung, who was sworn in in the summer of 2025, has also called for South Korea to "move toward a strong, self-reliant defense." On June 24, 2026, President Lee visited Yeonpyeong Island. He ignored U.S. President Donald Trump's demands for South Korea's navy to assist in the Persian Gulf during the Iran war. Additionally, President Lee has criticized the conduct of Israel, and South Korea voted in favor of recognizing Palestine as a full member state at the United Nations.

On September 9, 2025, protesters staged a rally near the U.S. Embassy in Seoul against the detention of South Korean workers during the immigration raid at the Hyundai plant. Signs at the rally read "A tariff bomb and workers confinement."

South Korean Foreign Minister Cho Hyun said, "I am coming to terms with the fact that the U.S. of the past, which engaged in really good cooperation with allies and friendly nations, is not the U.S. of today." In 2021, while a candidate for the Democratic Party of Korea, Lee referred to the United States as an "occupying force."

"It was surprising when Moon Jae-in mentioned it a decade ago, but Lee Jae-myung or other officials questioning the reliability of the United States' commitment is not particularly surprising," said Inwook Kim, an associate professor at Sungkyunkwan University's Department of Political Science and Diplomacy. Kim added, "It's not just Korea who is questioning how and to what extent U.S. foreign policy is changing under the Trump administration."

Eunbee Kim, an associate professor at the Korean National Defense University in Seoul, said, "Those things are a really big change." She stated, "We used to follow whatever the United States' decision is – we would basically give up our vote." She added, "But recently, we decided to go against the U.S. or, rather, make our voice heard." At the Group of Seven banquet in France in June 2026, U.S. President Donald Trump and President Lee met for 90 minutes to discuss peace on the Korean Peninsula and U.S.-Korea relations.