Canada and Mexico reject the U.S. hard line.

Canada and Mexico reject the U.S. hard line.

Economy minister says Mexico would accept U.S. proposal to review the agreement every five years.

Economy minister says Mexico would accept U.S. proposal to review the agreement every five years.

American negotiators asked to remove Mexico's long-haul industry from NAFTA cross-border services.

Talks are extended into 2018.

Talks are extended into 2018.

The potential dealbreakers are tempered by the pact's support in Congress.