The stakes are particularly high for Texas and other border states, where trade with Mexico is worth hundreds of billions of dollars a year.

US President Donald Trump has threatened to slap a 25-percent tariff on Mexican goods on February 1, a move that analysts say would deal a heavy blow to Latin America's second-largest economy.

President Donald Trump said a 25% tariff on Canada and Mexico could come on February 1 and that a universal tariff isn't off the table.