President Trump brought the same confrontational style of leadership he has used at home to the world’s most prominent stage on Tuesday as he vowed to “totally destroy North Korea” if it threatened the United States and denounced the nuclear agreement with Iran as “an embarrassment” that he may abandon.
In his first address to the United Nations General Assembly, Mr. Trump framed the conflicts as a test of the international system. The bombastic flourishes that generate approving roars at political events were met by stony silence, interrupted a few times by a smattering of applause, as Mr. Trump promised

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