President-elect Donald Trump and Mexican President Claudia Sheinbaum discussed Mexico’s approach to staving off illegal migration from Mexico but came away from the conversation with different characterizations of the plan. The call between the two leaders on Wednesday comes on the heels of Mr. Trump’s announcement that he would slap a 25% tariff on Mexico, Canada and China on all products coming from the countries until the flow of illegal migrants and drugs into the U.S. is halted. Mr. Trump said in a post on Truth Social that their conversation was “very productive” and that Ms. Sheinbaum “has agreed to...