Ties between the United States and Mexico have deepened over 30 years of free trade, creating both benefits and irritants. Customs (Tariff), Mexico, United States, International Trade and World Market, Protectionism (Trade), Trump, Donald J, United States Economy, Factories and Manufacturing, Economic Conditions and Trends, Agriculture and Farming, North American Free Trade Agreement, United States-Mexico-Canada Agreement, Oil (Petroleum) and Gasoline, Supply Chain, Illegal Immigration, Automobiles, Navarro, Peter, Canada Ties between the United States and Mexico have deepened over 30 years of free trade, creating both benefits and irritants. NYT > Business