Mexico readies for worst as 4th round of NAFTA talks open

Mexico appears to be preparing for the worst as the fourth round of talks on the North American Free Trade Agreement open in Washington D.C.

Mexico's foreign relations secretary says his country won't accept "limited, managed trade," an apparent reference to demands for higher U.S. and regional content rules on products like auto parts.

Luis Videgaray said Tuesday that "we have to be prepared to say no, and if necessary to get up from the table and if necessary leave the treaty."

Videgaray said leaving NAFTA would increase tariffs by an average of about 3.5 percent for the 44 percent of Mexican exports that use NAFTA trade preferences. He said "it would not be the end of the world."

The round of talks starts Wednesday.