U.S. President Donald Trump is again suggesting that NAFTA be terminated, this time saying that both Canada and Mexico are being 鈥渧ery difficult鈥�.

While he鈥檚 threatened to end the trade agreement before, this is the first time Trump has complained about Canada鈥檚 role in the talks.

Canada, the U.S. and Mexico began formal negotiations earlier this month to rework the 23-year-old trade deal.

When Trump previously threatened to blow up NAFTA, a representative for Foreign Affairs Minister Chrystia Freeland said 鈥渉eated rhetoric鈥� is common in trade negotiations, but that Canada鈥檚 priorities remain the same.

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Adam Austen said last week that Canada will 鈥渃ontinue to work hard to modernize NAFTA,鈥� in spite of the threats.

Experts of trade law say cancelling NAFTA would be complicated: it would prompt a legal showdown between the White House and Congress.

The latter once passed a law implementing NAFTA and could argue it is still on the books, meaning the agreement remains in effect.

The Canadian Press