The United States opens renewal talks on the United States-Mexico-Canada Agreement while pressing for stricter auto rules that would require 50% of cars to be made in the United States and raise regional content to about 82%.Automakers and supply-chain executives warn the United States proposals could disrupt production, raise vehicle prices and force expensive retooling, while Canada says it has been sidelined and President Donald Trump has threatened to withdraw from the pact. The three countries trade about $1.9T annually and the auto sector represents roughly 18% of that flow; USMCA-supported investments total about $180B concentrated largely in the United States. Negotiators have expanded talks to immigration and crime, increasing the chance discussions will stretch well past the renewal timetable and heightening pressure on businesses that depend on integrated North American supply chains.