U.S. President Donald Trump says he is terminating all trade negotiations with Canada over an advertisement by the Ontario government that uses the late U.S. president Ronald Reagan's own words to send an anti-tariff message to American audiences. 

In a late-night post to his Truth Social platform, Trump attacked the ad, which he attributed to Canada rather than Ontario, as fraudulent and fake. 

"TARIFFS ARE VERY IMPORTANT TO THE NATIONAL SECURITY, AND ECONOMY, OF THE U.S.A." Trump wrote. "Based on their egregious behavior, ALL TRADE NEGOTIATIONS WITH CANADA ARE HEREBY TERMINATED."

So I guess CUSMA is dead?