Although U.S. President Donald Trump says he only wants to tweak trade ties with Canada, his pledge to renegotiate NAFTA to focus on Mexico is almost impossible and Canada will not emerge unscathed, Canadian officials and trade experts said on Tuesday.

Trump had warm words for Canadian trade following a meeting with Prime Minister Justin Trudeau on Monday, but his call for major changes to the North American Free Trade Agreement to target Mexico stymied experts.

"I can't see how it's possible at all. It would be very complicated to do and I don't think Mexico would ... ever go along with it," said Mark Warner, a trade lawyer and principal at MAAW Law in Toronto.

This was excerpted from 14 February 2017 edition of Reuters Canada.