President Donald Trump affirmed on Thursday that imports from U.S. allies Mexico and Canada will be hit with a 25% tariff starting on Saturday. Speaking to the press from the Oval Office, Trump said that his administration will follow through in announcing tariffs on America’s neighboring countries for “a number of reasons”—chiefly among them being an alleged influx of migrants at the U.

The president reiterated that tariffs are coming, even as his advisers are considering several offramps to avoid enacting universal tariffs on Mexico and Canada, people familiar with the matter say.

TORONTO — Roughly $900 billion in annual trade between Canada and the United States — and, with it, traditionally chummy bilateral ties — is on the brink of upheaval, with President Donald Trump threatening to impose sweeping tariffs on Canada as early as this weekend.