WASHINGTON, D.C. (WNAX) – President Trump says he is not bluffing over his threat to impose a five percent tariff on all imports from Mexico over their failure to stem the flow of immigrants over the U.S. border.

South Dakota Congressman Dusty Johnson says Congress can and should become more involved.

Johnson says tariffs should be tied to trade negotiations.

Johnson says the Mexican tariff could be a problem for U.S. consumers.

The President says the tariffs will rise five percent a month until Mexico takes action on the border.