A delegation representing South Korean president-elect Yoon Suk-yeol visited the White House on Tuesday to discuss North Korea and other security issues.

After meeting U.S. Deputy Secretary of State Wendy Sherman on Monday, the U.S.-ROK Policy Consultation Delegation met White House National Security Advisor Jake Sullivan on Tuesday and delivered a letter to U.S. President Joe Biden, according to Yoon’s press office.

The letter reflected Yoon’s “resolute willingness and vision” to develop the bilateral alliance into a “comprehensive strategic alliance” in order to better respond to emerging challenges such as North Korean nuclear threat and economic security, head of delegation