Politico, citing an unnamed source and a US official, reports President Trump and Mexican President Sheinbaum spoke Wednesday and are close to resolving USMCA-related disputes. A source described the call as uneven and said new issues emerged, while a US official called it constructive; Mexican officials believe differences are nearing resolution. Negotiations have focused on autos, steel and aluminum, agriculture, labor and economic security. The fourth formal negotiating round has been moved to Sept. 28-29 in Washington; both sides said they made progress after July's third round.(金十)