OTTAWA, Feb 6- Any move to tear up the North American Free Trade Agreement would devastate the economies of members Canada, Mexico and the United States, the head of an influential US business group said on Monday.
US President Donald Trump, who says NAFTA has been a disaster for American workers, wants to renegotiate the deal and says he is prepared to walk away if he does not get the changes he wants.
Thomas Donohue, president and chief executive officer of the US Chamber of Commerce, said Canada and Mexico were America's two top export markets.
"Withdrawing from NAFTA would be devastating for the workers, businesses, and economies of our countries," he told a business audience in the Canadian capital Ottawa.
"Beneath all the debates, arguments, and attention-grabbing headlines, I think our leaders across the board understand this," said Donohue, who was due to meet Canadian Prime Minister Justin Trudeau later in the day.