The declaration from Trump comes after he said over the weekend that he had spoken to the leaders of Cambodia and Thailand, urging a ceasefire, adding the U.S. would not get back to the "trading table" with the southeast Asian countries until fighting stops.

Commerce Secretary Howard Lutnick said Wednesday that Thailand and Cambodia reached trade agreements with the U.S. just days after the Southeast Asian countries agreed to a ceasefire to end the five days of deadly clashes along their border.