1. President Trump is poised to decide whether the U.S. will remain a part of the Paris climate agreement, a decision that has deeply divided his administration. He met with Prime Minister Nguyen Xuan Phuc of Vietnam, above, in the Oval Office.

A withdrawal would severely weaken the 2015 accord that committed nearly every nation to take action to slow down global warming. Mr. Trump has said that regulations would hurt the U.S. economy and hinder job creation.