Mexico sees a serious risk the United States will withdraw from NAFTA and is planning for that eventuality, Economy Minister Ildefonso Guajardo said on Tuesday, calling talks to renegotiate the deal a "roller coaster" that could lead to an impasse.

U.S. President Donald Trump has threatened three times in the past week to abandon the North American Free Trade Agreement, revisiting his view that the United States would probably have to start the process of exiting the accord to reach a fair deal for his country.

Trump has vowed to get a better deal for American workers, and the lively rhetoric on both sides precedes a second round of talks starting on Friday in Mexico City to renegotiate the 1994 accord binding the United States, Mexico and Canada.

This was excerpted from the 30 August 2017 edition of CBC News.