Seoul: The South Korea-U.S. defense ministers' meeting held in Washington on Monday starkly illustrated the changing trajectory of the alliance in recent months. With a summit between U.S. President Donald Trump and Chinese President Xi Jinping looming, the focus should have been on reaffirming coordination against North Korea's nuclear threat and the allies' commitment to security cooperation on the Korean Peninsula. Yet discussions on North Korea's nuclear program were nowhere to be found.

According to Yonhap News Agency, signs are also emerging that South Korea is being sidelined on the diplomatic front. U.S. Treasury Secretary Scott Bessent met on Tuesday with Japanese Prime Minister Sanae Takaichi in Japan, as well as the finance and economy ministers, pledging U.S.-Japan cooperation on exchange rates and discussing energy and critical mineral supply chains. On Wednesday, he is set to meet Chinese Vice Premier He Lifeng in Seoul. Although he is also scheduled to pay a courtesy call to President Lee Jae Myung, it is highly unusual for a visiting top U.S. economic official not to meet his South Korean counterparts, including Deputy Prime Minister and Finance Minister Koo Yun-cheol.

This goes beyond a mere diplomatic slight. It could also be interpreted as evidence that South Korea's strategic value is slipping down Washington's list of priorities. The concern is serious enough to raise questions about whether the upcoming U.S.-China summit could produce a compromise over North Korea's nuclear issue without Seoul's position being properly reflected -- or even lead to sudden direct contact between Washington and Pyongyang.

The cracks now appearing in the South Korea-U.S. alliance are far from normal. If they are not corrected early, the price South Korea may have to pay amid mounting global uncertainty will only grow larger. What is urgently needed is the government's clear-eyed assessment of the situation and the effective exercise of substantive diplomatic capabilities.