Every day a flurry of parts and products are shuttled between Texas and Mexico, part of a cross-border supply chain to make everything from cars and heavy duty machinery to flat screen televisions. The future of that partnership,

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.

While much about the threatened tariffs is still unclear, experts predict they would be bad news for all three economies, with few winners.