Vehicles built under NAFTA have a huge component made in all 3 countries. Which is why dismantling the treaty would have caused havoc in the industry for years. And not benefitted any country. The fact that parts come from the entire trading block means that you, the consumer, get a better deal in the end. And the companies are able to compete price-wise with imports. Political rant over.
So, where do you get the notion that the Fiesta was "made in America"?
AFAIK, it's assembled in Izcalli, Mexico.
Globalization rules!