Ontario Premier Doug Ford said President Donald Trump can "kiss my ass" following threats of heavy tariffs on Canadian imports.

The dispute threatens the stability of the integrated North American automotive and steel supply chains, which are critical to the economies of both nations.

Ford said Monday during an interview with CTV News regarding a post by Trump on Truth Social. In the post, the US president threatened to impose 50% tariffs [1] on Canadian auto and steel products. Ford responded by describing the US president as "arrogant and cocky" [1].

The premier warned that Canada would not accept these measures without a fight. He said Canada will "throw everything in the kitchen sink at him" [1] in response to the proposed trade barriers.

Ford did not specify the exact nature of the retaliatory measures, but his comments signal a sharp escalation in rhetoric between the Ontario provincial government and the White House. The automotive sector remains one of the largest employers in Ontario and a primary driver of trade with the U.S.

While the federal government typically manages international trade treaties, Ford's public rebuke highlights the direct economic impact such tariffs would have on Ontario's industrial heartland. The proposed 50% rate [1] would represent a significant shift in trade policy, potentially disrupting thousands of cross-border shipments daily.

"He can kiss my ass."

This confrontation underscores a volatile shift in US-Canada trade relations. By using aggressive language, Premier Ford is signaling to both the US administration and domestic stakeholders that Ontario is prepared for a trade war to protect its manufacturing sector. This creates a complex diplomatic dynamic where a provincial leader is publicly challenging a foreign head of state, potentially complicating federal negotiations to avoid the proposed tariffs.