CBP summarized the new trade deal: “The USMCA modernizes trade among the United States, Canada, and Mexico, introducing updated rules of origin, customs administration and trade facilitation provisions, intellectual property rights protections, and fair labor conditions.”
It is going to do a lot to close the back doors that existed for Chinese imports, by either trans-shipping them through Mexico or Canada, or sending the components for final assembly in Mexico or Canada.
Just more ways to smuggle in DOPE.