With only days before the first round of tariffs take effect, Canada’s allies in Washington, D.C., are pushing for U.S. President Donald Trump to permanently rescind the measures, arguing a trade war would cause economic harm on both sides of the border.

President Trump says his 25 percent tariff on imports from Canada will go into effect on Tuesday, despite Canadian officials’ efforts to persuade their American counterparts that they have improved border security.

Trump put 25% tariffs on goods from Canada and Mexico on Tuesday. Markets tanked. And by Thursday, he had decided to broadly lift them.