Donald Trump is reasserting a threat to quit NAFTA if he becomes U.S. president in November.

The Republican nominee is promising to seek a total renegotiation of the free trade deal with Canada and Mexico and to withdraw from the agreement if he cannot obtain the terms he wants.

Trump’s pledge is seen as a potential danger for Canada. Our country has enjoyed a preferential economic relationship with its most important trading partner since late in Ronald Reagan’s presidency.

Canada and the United States exchange more than $2.4-billion in goods and services each day and Canada is the top export destination for 35 states.

During his speech yesterday, Trump also announced a revamped economic plan which he says will revitalize the American economy by cutting taxes for workers and businesses.

But Democratic nominee Hillary Clinton responded by saying his plan would benefit the rich and do little to create jobs or boost the economy.

“You know that old saying, fool me once, shame on you. Fool me twice, shame on me?” Hillary asked a group of supporters, “Trickle down economics does not help our economy grow. It does not help the vast majority of Americans.”

Clinton is scheduled today to give an economic speech to the same economic club in Detroit where Trump spoke yesterday.