Fourth US-Mexico USMCA Review Round Opens in Washington

The fourth formal US-Mexico USMCA review round runs Sept 28-29 in Washington, led by USTR Jamieson Greer and Economy Secretary Marcelo Ebrard. Mexico's agenda centers on 50% steel/aluminum and 25% auto tariffs; Washington is pressing on rules of origin and North American supply-chain share. The round had been postponed a week after the Sept 16 Trump-Sheinbaum call. A broader 30% tariff threat looms if the review fails.