4 Things to Know About the History of NAFTA, as Trump Takes Another Step Toward Replacing It

On Friday at the G-20 Summit, U.S. President Donald Trump, Canadian Prime Minister Justin Trudeau and Mexico's outgoing president Enrique Peña Nieto signed the United States-Mexico-Canada Agreement (USMCA). Trump celebrated with a tweet hailing the new trade deal as the end of the "terrible" North American Free Trade Agreement (NAFTA), which has been in effect since Jan. 1, 1994.

That treaty, which President Bill Clinton signed on Dec.