(NBC) - President Trump gave formal notice on Thursday that he will renegotiate NAFTA, the free trade deal between the US, Canada and Mexico.
Administration officials sent a letter to Congress that triggers a 90-day consolation period among the administration, Congress and business.
Negotiations can begin as early as August.
President Trump has labeled NAFTA the worst trade deal in history.
This is the first step toward reshaping a trade deal that became a law in 1994 and changed the face of trade in North America.