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USMCA

Updated at 8:25 a.m. ET

President Trump, Canadian Prime Minister Justin Trudeau and Mexican President Enrique Peña Nieto signed the new U.S. Mexico Canada Agreement — or USMCA — in Buenos Aires Friday, using the backdrop of the G-20 Summit to resolve a trade dispute between America and its closest neighbors.

Updated at 3:45 p.m. ET

The U.S. and Canada reached a deal to replace the North American Free Trade Agreement, signed a quarter-century ago, with a new pact that the Trump administration says is easier to enforce.

In remarks in the Rose Garden formally announcing the agreement, President Trump called it "the most important trade deal we've ever made by far."

Ahead of a midnight deadline set by the White House, Trump approved changes that essentially revamp the 1993 NAFTA deal, bringing Canada on board after Mexico had already agreed in August.