MEXICO CITY, April 4 (Reuters) - Mexico, Canada and the United States are exploring alternative proposals on rules of origin for autos, a key sticking point in the talks to update the North American Free Trade Agreement (NAFTA), a Mexican source said on Wednesday.
U.S. President Donald Trump's negotiators have demanded that the North American content of vehicles made in NAFTA nations increase to 85 percent from 62.5 percent.
The Mexican source added that U.S. negotiators begun showing "some flexibility" on the issue.