The business world is mobilizing to convince the Trump administration to save the North American Free Trade Agreement, which corporate leaders say has greatly benefited the world's largest economy for 23 years.

With televised ads proclaiming "NAFTA works for America" and study after study enumerating the dangers of withdrawing from the treaty, the US Chamber of Commerce and like-minded trade proponents have taken their message to Capitol Hill.

The effort has taken on added significance now that negotiators from Canada, the United States and Mexico working to overhaul the treaty are conducting their fifth round of talks in Mexico City.

"We -- along with several other business, agriculture, and industry groups -- made the case on the Hill in recent weeks. On October 24, the group talked about NAFTA with all 100 Senate offices," a spokeswoman for the US Chamber of Commerce told AFP.