Business groups, economists and even some Republicans cautioned that new tariffs on goods from Canada, Mexico and China could undercut U.S. industry and the economy. Customs (Tariff), Trump, Donald J, Canada, Mexico, China, Trudeau, Justin, Protectionism (Trade) Business groups, economists and even some Republicans cautioned that new tariffs on goods from Canada, Mexico and China could undercut U.S. industry and the economy. NYT > Business