Energy products have a lower rate of 10%, while other goods covered by the U.S.-Canada-Mexico Agreement are exempt.

That trade agreement is slated for review. Trump negotiated the deal in his first term, but has since soured on it.

Trump and Carney will both attend the Association of Southeast Asian Nations summit in Malaysia. But Trump told reporters traveling with him that he had no intention of meeting Carney there.

Trump said the ad misrepresented the position of Reagan, a two-term president and a beloved figure in the Republican Party. But Reagan was wary of tariffs and used much of the 1987 address featured in Ontario's ad spelling out the case against tariffs.

Trump has complained the ad was aimed at influencing the U.S. Supreme Court ahead of arguments scheduled for next month that could decide whether Trump has the power to impose his sweeping tariffs, a key part of his economic strategy.