Amid warnings of price increases, Canada moved quickly to retaliate, China said it had planned countermeasures and Mexico said it would soon unveil its response. United States, Customs (Tariff), China, Canada, Mexico, International Trade and World Market, United States International Relations, Fentanyl, Trump, Donald J, Trudeau, Justin, Politics and Government, World Trade Organization Amid warnings of price increases, Canada moved quickly to retaliate, China said it had planned countermeasures and Mexico said it would soon unveil its response. NYT > Business