Mexico Authorises 5–50% MFN Tariffs on 1,463 Import Lines, Triggering Indian & Chinese Push-Back

Protectionist bursts seldom occur in a vacuum. Mexico’s move recalls the 1930 Smoot-Hawley tariff, which also hiked hundreds of lines to shield domestic industry during U.S.-Canada negotiations and triggered counter-retaliation. More recently, Washington’s 2018 Section 232 metal tariffs set the precedent for unilateral hikes justified as ‘resilience’. Mexico, embedded in the USMCA supply chain, now faces U.S. pressure to police Chinese trans-shipment; its new MFN wall signals the broader decoupling trend and the re-regionalisation of trade last dominant in the pre-GATT era. If replicated elsewhere, such measures could erode the rules-based tariff ceilings painstakingly bound since the 1947 GATT rounds, reshaping global trade architecture for decades—much as the inter-war protectionist spiral rewired commerce for half a century. On a 100-year horizon, the episode is a data-point in the pendulum swing between liberalisation (1990s-2010s) and controlled blocs (2020s-?).