President Trump says Canada and Mexico are "very difficult"

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WASHINGTON, D.C., (AP) -- President Trump is accusing Canada and Mexico of being "very difficult".

This comes after negotiations over the North American Free Trade Agreement (NAFTA) and is threatening to terminate the deal.

The president tweeted on Sunday morning that NAFTA is the "worst trade deal ever made."

Last week at a rally in Phoenix, President Trump said that he would "end up terminating" NAFTA "at some point."