President trump has imposed a 25 percent tariff on imports from canada and mexico, reversing decades of economic partnership and raising concerns about the implications for North America.

President trump imposed tariffs on imports from canada and mexico.

One of the countries affected by the tariff imposed by trump.

Another country affected by the tariff imposed by trump.

The trade agreement that includes canada and mexico.

A senior fellow at the Council on Foreign Relations who criticized trump's decision.