The North American Free Trade Agreement, Donald Trump said on Wednesday, “has been a far greater benefit to Mexico” than the U.S. Just minutes before, Mexican President Enrique Pena Nieto, standing by Trump’s side in Mexico City, said Nafta had done both countries “a lot of good.” Trump disagrees over which country benefited the most, but he didn’t disavow …

  Barack Obama and Xi Jinping have obvious disagreements over how to handle North Korea’s illicit weapons program. China is angry about U.S. plans to deploy advanced missile defenses in South Korea to counter the threat, while Obama faces pressure to sanction Chinese banks and companies that help sustain Kim Jong Un’s nuclear ambitions. But the two presidents still have …

  After the US and China ratified the Paris climate accord, there is growing optimism that the agreement can take effect by the end of the year. It has to be signed by 55 countries responsible for 55% of greenhouse gas (GHG) emissions. And ratification by the two economic giants — who emit 38% of the climate-harming GHSs — is …