With a trade war brewing, President Trump gave the Mexican president a sign of grudging respect: “You’re tough,” he told her in a phone call last month, according to four people with knowledge of the exchange. By their most recent…

With a trade war brewing, President Trump gave the Mexican president a sign of grudging respect: “You’re tough,” he told her in a phone call last month, according to four people with knowledge of the exchange. By their most recent…