President Trump blasted the United Nations for not being more involved in ending wars as he signed peace and trade deals Sunday with the leaders of Cambodia, Thailand and Malaysia — with the three nations pledging to boost US economic ties in exchange for lower tariffs. Trump, 79, said the peace accord formalizing a truce he brokered between Cambodia and Thailand in July may save “millions of lives” in the two Southeast Asian nations, which were represented by their prime ministers at the ceremony in the Malaysian capital.