"President Trump and President Moon will discuss ways to further strengthen the ironclad US-ROK (Republic of Korea) alliance" during the June 29-30 talks, a White House statement said today.
The leaders will seek to "advance cooperation on economic and global issues" and "will also coordinate on North Korea- related issues, including countering the growing North Korean nuclear and missile threats," it added.
The center-left Korean leader, who was sworn in last month after a landslide election win, favors engagement with the North to bring it to the negotiating table, rather than the hardline stance taken by the conservative government of his ousted predecessor Park Geun-Hye.
In written testimony, Mattis said North Korea is increasing the pace and scope of a nuclear weapons program that leader Kim Jong-Un has stated will one day be capable of striking the United States.
"The most urgent and dangerous threat to peace and security is North Korea," Mattis said.