Senior White House official played down Trump’s earlier talk about ill-defined import tax.
Topping the list of troubling factors is trade disruption as NAFTA goes under the knife and the possibility of a border tax.
A border adjustment tax could make it more difficult for Canadian producers to compete in the US.
Finance minister says such a tax would disrupt a mutually beneficial trade relationship and impose extra costs on US firms.
Resource minister notes opponents see it as not in US-Canada’s energy interests.
Examination will cover non-tariff barriers, lax legal enforcement, currency manipulation and other means.
The Republican-backed proposal would alter the tax system to penalize imports, without special status for Canada.