The ouster of Stephen Bannon as White House senior strategist has removed the most visible link between President Donald Trump and his populist base. But the nationalist worldview that candidate Trum…

Next week Donald J. Trump returns to the United Nations for the annual opening of the UN General Assembly. While Trump exceeded expectations during his first UN appearance last year, he will face mor…

Critics are panning the president’s new trade deal with Canada and Mexico as a minor update. They’re wrong—it’s a significant accomplishment.

A Global Pact for the Environment would lend coherence to international environmental law, give greater legal and political heft to existing environmental covenants, and safeguard the imperiled biosp…

President Trump’s hosting of Prime Minister Viktor Orban will be viewed as a boost to populists and another blow to Europe’s strained political center.