President Donald Trump said he planned to enact previously threatened tariffs of as much as 25% on Mexico and Canada by Feb. 1, reiterating his contention that America’s two immediate neighbors are allowing the flow of undocumented migrants and drugs into the country.

Canadian leaders expressed relief that broad tariffs were not applied to Canadian products on the first day of Donald Trump’s presidency.

Trump in response to a reporter’s question said the administration was considering imposing tariffs of 25% on imports from Mexico and Canada as soon as Feb. 1. The moves, if implemented, would kickstart a long-expected trade war between the three countries.